use playwright cli for test .only check

[sharon-wang]

• addresses Git pre-commit hook errors during .only check #5735

Implementation

• use the playwright CLI to check for .only in test files, following the method in [Feature] probe for tests with .only without running any tests microsoft/playwright#28689 npx playwright test --list --forbid-only
  • we no longer use eslint+mocha to do this check
• add option to skip the .only check by setting the environment variable SKIP_DOT_ONLY_CHECK (can be set to anything)
  • example usage: SKIP_DOT_ONLY_CHECK=1 git commit
• rename the .only scripts to be tool-agnostic

QA Notes

• committing tests without .only should not result in an error
• committing files that aren't tests should not kick off the .only check
• setting SKIP_DOT_ONLY_CHECK in the env before committing should skip the .only check
• error in Git pre-commit hook errors during .only check #5735 should no longer occur since we are not using Eslint + Mocha to do this check

I have tested this on Mac and Windows.

[github-actions]

E2E Tests 🚀  ^?
This PR will run tests tagged with: @critical

[testlabauto]

Very cool! Thanks!
LGTM!

[sharon-wang]

This is working for me on Windows 👍

I was getting some incorrect behaviour, but realized I had to go into test/automation and run npm run compile to make sure the automation artifacts were generated.

Chris pointed out that the test failure is known. This PR only touches precommit-related scripts, so should be unrelated.