Repair wp/7.1 branch Actions: Reference trunk's reusable workflow-lint job

[desrosj]

What?

• Removes the local .github/workflows/reusable-workflow-lint.yml and points workflow-lint.yml at WordPress/gutenberg/.github/workflows/reusable-workflow-lint.yml@trunk instead.
• Updates the branch filtering rules to match those added in Workflows: Refine and complete the push and pull_request branch filters WordPress/gutenberg#82744, which allows the workflow to run in wp/X.Y branches.

Why?

Linting workflow files helps prevent incorrect and/or insecure patterns from being introduced into the codebase.

Use of AI Tools

This PR was created by Claude Code under my supervision. All code should be treated as AI-produced and not yet reviewed by a human until this PR is marked Ready for Review.

[github-actions]

Flaky tests detected in ea4ee12.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/desrosj/gutenberg/actions/runs/33516742390
📝 Reported tests:

should update the HTML only for the latest navigation in /test/e2e/specs/interactivity/router-navigate.spec.ts, passed after 1 failed attempt.

TypeError: resolveLink2 is not a function
    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/interactivity/router-navigate.spec.ts:100:39
    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/interactivity/router-navigate.spec.ts:100:3

[github-actions]

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Co-authored-by: desrosj <desrosj@git.wordpress.org>

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[desrosj]

Migrated to real upstream: WordPress#82788. Closing this fork PR.

[github-actions]

🤖 PR meta 🤖

🏁 Flaky tests

Show the failures

Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

Should save the changes in /test/e2e/specs/editor/plugins/wp-editor-meta-box.spec.js, passed after 2 failed attempts.

TimeoutError: page.waitForFunction: Timeout 10000ms exceeded.
    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/plugins/wp-editor-meta-box.spec.js:37:14
TimeoutError: locator.click: Timeout 10000ms exceeded.
Call log:
  - waiting for locator('role=button[name="Visual"i]')

    at /home/runner/work/gutenberg/gutenberg/test/e2e/specs/editor/plugins/wp-editor-meta-box.spec.js:36:55

_{7787e94 Run}