CI: Enable trunk jobs on PRs on main/release

[digantdesai]

This is a temporary change to ensure stability for the main branch before 1.0 cut. This will be reverted next week.

Summary

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Test plan

[PLEASE REMOVE] How did you test this PR? Please write down any manual commands you used and note down tests that you have written if applicable.

[pytorch-bot]

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[github-actions]

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