Add documentation for preview aliases during version upload

[WillTaylorDev]

Summary

Provides new documentation for new preview aliases. Preview aliases give the user a way to reference
a preview for a version with a stable name. This is akin to branch aliases for Pages.

Documentation checklist

• The documentation style guide has been adhered to.

[hyperlint-ai]

Howdy and thanks for contributing to our repo. The Cloudflare team reviews new, external PRs within two (2) weeks. If it's been two weeks or longer without any movement, please tag the PR Assignees in a comment.

We review internal PRs within 1 week. If it's something urgent or has been sitting without a comment, start a thread in the Developer Docs space internally.

---

PR Change Summary

Added documentation for preview aliases during version upload, enhancing user reference capabilities for Worker versions.

• Introduced new preview aliases for Worker versions, allowing stable naming for previews.
• Updated documentation to include details on creating and using preview aliases.
• Clarified the format and rules for aliased preview URLs.

Modified Files

• src/content/docs/workers/configuration/multipart-upload-metadata.mdx
• src/content/docs/workers/configuration/previews.mdx
• src/content/docs/workers/wrangler/commands.mdx

---

How can I customize these reviews?

Check out the Hyperlint AI Reviewer docs for more information on how to customize the review.

If you just want to ignore it on this PR, you can add the hyperlint-ignore label to the PR. Future changes won't trigger a Hyperlint review.

Note specifically for link checks, we only check the first 30 links in a file and we cache the results for several hours (for instance, if you just added a page, you might experience this). Our recommendation is to add hyperlint-ignore to the PR to ignore the link check for this PR.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @korinne, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @kodster28, @cloudflare/wrangler, @cloudflare/workers-runtime-1, @cloudflare/wrangler
/src/content/docs/workers/wrangler/	@cloudflare/wrangler, @irvinebroque, @kodster28, @cloudflare/pcx-technical-writing, @cloudflare/workers-runtime-1

[github-actions]

Preview URL: https://86706f87.preview.developers.cloudflare.com
Preview Branch URL: https://willtaylor-version-aliases.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/configuration/previews/	https://willtaylor-version-aliases.preview.developers.cloudflare.com/workers/configuration/previews/
https://developers.cloudflare.com/workers/wrangler/commands/	https://willtaylor-version-aliases.preview.developers.cloudflare.com/workers/wrangler/commands/
https://developers.cloudflare.com/workers/configuration/multipart-upload-metadata/	https://willtaylor-version-aliases.preview.developers.cloudflare.com/workers/configuration/multipart-upload-metadata/