feat: copy submit pipeline arguments from custom run id

[maxy-shpfy]

Description

Closes https://github.com/Shopify/oasis-frontend/issues/421

Enhanced the "Copy from Run" functionality in the SubmitTaskArgumentsDialog component to allow users to copy arguments from a specific run by entering a run ID directly. This improves workflow efficiency by providing an alternative to selecting from the recent runs list.

Type of Change

• New feature
• Improvement

Checklist

• I have tested this does not break current pipelines / runs functionality
• I have tested the changes on staging

Test Instructions

Screen Recording 2026-01-12 at 6.41.59 PM.mov (uploaded via Graphite)

1. Open the task submission dialog
2. Click on "Copy from Run"
3. Test entering a valid run ID in the new input field and verify arguments are copied
4. Test entering an invalid run ID and verify error handling
5. Verify that selecting from recent runs still works as before
6. Confirm that copied arguments are merged with existing ones rather than replacing them completely

Additional Comments

The implementation now merges copied arguments with existing ones instead of replacing them entirely, preserving any manually entered values that aren't being overwritten.

[maxy-shpfy]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat: copy submit pipeline arguments from custom run id #1623 👈 (View in Graphite)
• feat: copy submit run arguments from recent run #1622
• feat: submit run with arguments #1618
• fix: call rerun pipeline with actual task arguments #1615
• feat: display arguments values in input nodes in run view #1612
• feat: display taskspec arguments values in run view #1611
• master

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