feat: add support for polymorphic uploads

[paulpopus]

This PR adds support for polymorphic uploads similar to polymorphic relationships. Closes #13912

It works with bulk upload as well and in the bulk uploader you can choose which collection the files are uploaded into.

You can enable this by adding an array of slugs into relationTo:

import type { CollectionConfig } from 'payload'

export const ExampleCollection: CollectionConfig = {
  slug: 'example-collection',
  fields: [
    {
      name: 'media',
      type: 'upload',
      relationTo: ['images', 'documents', 'videos'], // references multiple upload collections
    },
  ],
}

It can also be combined with hasMany:

import type { CollectionConfig } from 'payload'

export const ExampleCollection: CollectionConfig = {
  slug: 'example-collection',
  fields: [
    {
      name: 'media',
      type: 'upload',
      relationTo: ['images', 'documents', 'videos'], // references multiple upload collections
      hasMany: true, // allows multiple uploads
    },
  ],
}

Known issue: #12014
Filtering by polymorphic relationships is currently broken and I'll work on that in a separate PR.

[JarrodMFlesch]

I think the where builder will need to be adjusted to handle (by constraining options) poly upload fields. Similar to how the relationship field does here: https://github.com/payloadcms/payload/blob/main/packages/ui/src/elements/WhereBuilder/field-types.tsx

[github-actions]

📦 esbuild Bundle Analysis for payload

This analysis was generated by esbuild-bundle-analyzer. 🤖

Meta File	Out File	Size (raw)	Note
packages/next/meta_index.json	esbuild/index.js	755.90 KB	🆕 Added
packages/payload/meta_index.json	esbuild/index.js	1.22 MB	🆕 Added
packages/payload/meta_shared.json	esbuild/exports/shared.js	162.94 KB	🆕 Added
packages/richtext-lexical/meta_client.json	esbuild/exports/client_optimized/index.js	279.45 KB	🆕 Added
packages/ui/meta_client.json	esbuild/exports/client_optimized/index.js	1.15 MB	🆕 Added
packages/ui/meta_shared.json	esbuild/exports/shared_optimized/index.js	14.39 KB	🆕 Added

Largest paths

These visualization shows top 20 largest paths in the bundle.

Meta file: packages/next/meta_index.json, Out file: esbuild/index.js

Path	Size
../../node_modules	${{\color{Goldenrod}{ ████████████████████ }}}$ 80.1%, 601.84 KB
dist/views/Version	${{\color{Goldenrod}{ █▋ }}}$ 6.7%, 50.07 KB
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dist/views/Account	${{\color{Goldenrod}{ ▏ }}}$ 0.7%, 5.32 KB
dist/elements/DocumentHeader	${{\color{Goldenrod}{ ▏ }}}$ 0.6%, 4.81 KB
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(other)	${{\color{Goldenrod}{ ████▉ }}}$ 19.9%, 149.38 KB

Meta file: packages/payload/meta_index.json, Out file: esbuild/index.js

Path	Size
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dist/collections/operations	${{\color{Goldenrod}{ ▊ }}}$ 3.0%, 37.03 KB
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dist/queues/operations	${{\color{Goldenrod}{ ▎ }}}$ 1.0%, 12.04 KB
dist/globals/operations	${{\color{Goldenrod}{ ▎ }}}$ 1.0%, 11.91 KB
dist/fields/config	${{\color{Goldenrod}{ ▎ }}}$ 1.0%, 11.57 KB
dist/utilities/configToJSONSchema.js	${{\color{Goldenrod}{ ▏ }}}$ 0.9%, 11.54 KB
dist/fields/validations.js	${{\color{Goldenrod}{ ▏ }}}$ 0.8%, 10.21 KB
dist/bin/generateImportMap	${{\color{Goldenrod}{ ▏ }}}$ 0.7%, 8.31 KB
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dist/uploads/fetchAPI-multipart	${{\color{Goldenrod}{ ▏ }}}$ 0.6%, 7.74 KB
dist/index.js	${{\color{Goldenrod}{ ▏ }}}$ 0.6%, 7.51 KB
dist/collections/endpoints	${{\color{Goldenrod}{ ▏ }}}$ 0.6%, 6.94 KB
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Meta file: packages/payload/meta_shared.json, Out file: esbuild/exports/shared.js

Path	Size
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dist/auth/cookies.js	${{\color{Goldenrod}{ ▎ }}}$ 1.0%, 1.55 KB
dist/utilities/flattenTopLevelFields.js	${{\color{Goldenrod}{ ▏ }}}$ 0.9%, 1.42 KB
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dist/utilities/sanitizeUserDataForEmail.js	${{\color{Goldenrod}{ }}}$ 0.4%, 713 B
dist/utilities/getFieldPermissions.js	${{\color{Goldenrod}{ }}}$ 0.4%, 651 B
dist/collections/config	${{\color{Goldenrod}{ }}}$ 0.4%, 570 B
dist/bin/generateImportMap	${{\color{Goldenrod}{ }}}$ 0.4%, 561 B
dist/auth/sessions.js	${{\color{Goldenrod}{ }}}$ 0.3%, 525 B
dist/utilities/getSafeRedirect.js	${{\color{Goldenrod}{ }}}$ 0.3%, 423 B
dist/utilities/deepMerge.js	${{\color{Goldenrod}{ }}}$ 0.3%, 413 B
dist/utilities/formatLabels.js	${{\color{Goldenrod}{ }}}$ 0.2%, 380 B
dist/utilities/appendUploadSelectFields.js	${{\color{Goldenrod}{ }}}$ 0.2%, 360 B
dist/utilities/transformColumnPreferences.js	${{\color{Goldenrod}{ }}}$ 0.2%, 348 B
(other)	${{\color{Goldenrod}{ █████▏ }}}$ 20.5%, 32.70 KB

Meta file: packages/richtext-lexical/meta_client.json, Out file: esbuild/exports/client_optimized/index.js

Path	Size
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dist/lexical/plugins	${{\color{Goldenrod}{ ██▉ }}}$ 11.5%, 31.68 KB
dist/lexical/ui	${{\color{Goldenrod}{ ██▏ }}}$ 8.8%, 24.36 KB
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dist/features/toolbars	${{\color{Goldenrod}{ █▌ }}}$ 6.4%, 17.75 KB
dist/features/upload	${{\color{Goldenrod}{ █▎ }}}$ 5.0%, 13.69 KB
dist/features/textState	${{\color{Goldenrod}{ █ }}}$ 4.0%, 11.08 KB
dist/features/relationship	${{\color{Goldenrod}{ ▊ }}}$ 3.2%, 8.96 KB
dist/lexical/utils	${{\color{Goldenrod}{ ▋ }}}$ 2.9%, 8.08 KB
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dist/utilities/fieldsDrawer	${{\color{Goldenrod}{ ▋ }}}$ 2.6%, 7.12 KB
dist/features/converters	${{\color{Goldenrod}{ ▋ }}}$ 2.5%, 7.04 KB
dist/lexical/config	${{\color{Goldenrod}{ ▍ }}}$ 1.8%, 5.08 KB
dist/features/lists	${{\color{Goldenrod}{ ▍ }}}$ 1.8%, 5.00 KB
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dist/lexical/LexicalEditor.js	${{\color{Goldenrod}{ ▎ }}}$ 1.1%, 3.17 KB
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Meta file: packages/ui/meta_client.json, Out file: esbuild/exports/client_optimized/index.js

Path	Size
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dist/elements/FolderView	${{\color{Goldenrod}{ ▋ }}}$ 2.6%, 29.17 KB
dist/elements/BulkUpload	${{\color{Goldenrod}{ ▌ }}}$ 2.4%, 26.93 KB
dist/elements/WhereBuilder	${{\color{Goldenrod}{ ▍ }}}$ 1.5%, 16.84 KB
dist/views/Edit	${{\color{Goldenrod}{ ▎ }}}$ 1.4%, 16.03 KB
dist/fields/Relationship	${{\color{Goldenrod}{ ▎ }}}$ 1.3%, 15.40 KB
dist/elements/Table	${{\color{Goldenrod}{ ▎ }}}$ 1.3%, 15.29 KB
dist/forms/Form	${{\color{Goldenrod}{ ▎ }}}$ 1.3%, 15.12 KB
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Meta file: packages/ui/meta_shared.json, Out file: esbuild/exports/shared_optimized/index.js

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Details

Next to the size is how much the size has increased or decreased compared with the base branch of this PR.

• ‼️: Size increased by 20% or more. Special attention should be given to this.
• ⚠️: Size increased in acceptable range (lower than 20%).
• ✅: No change or even downsized.
• 🗑️: The out file is deleted: not found in base branch.
• 🆕: The out file is newly found: will be added to base branch.