test(formatter/yaml): populate Prettier tests for YAML

[siketyan]

Summary

This pull request enables Prettier tests on the YAML formatter and populates existing tests from the Prettier repository. Snapshots are also created, but the formatter is still no-op.

Test Plan

N/A

Docs

N/A

[changeset-bot]

⚠️ No Changeset found

Latest commit: a39a6b9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codspeed-hq]

CodSpeed Performance Report

Merging #8330 will not alter performance

_{Comparing siketyan:test/yaml-prettier-tests (a39a6b9) with next (da85e3c)¹}

Summary

✅ 58 untouched
⏩ 95 skipped²

Footnotes

1. No successful run was found on next (4f7909d) during the generation of this report, so da85e3c was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 95 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩