Backport: Skip pull_request triggered runs in private repos - 4.7 Branch

[desrosj]

This backports 15c4b04 (r63183) to the 4.7 branch.

Merge Conflict Resolution

The 4.7 branch's .github/workflows/ directory only contains four of the twelve workflow files touched by the original commit: coding-standards.yml, javascript-tests.yml, phpunit-tests.yml, and test-build-processes.yml. git cherry-pick produced conflicts on every file (content conflicts on the four present files, plus modify/delete conflicts on the eight files that don't exist on this branch), so the cherry-pick was aborted and the change was applied by hand to only the jobs that exist here, using the original commit message.

• coding-standards.yml: updated the if: condition on the jshint job (the phpcs job present on trunk does not exist on this branch).
• javascript-tests.yml: updated the if: condition on the test-js job.
• phpunit-tests.yml: updated the if: condition on the test-php job. This branch's phpunit-tests.yml has a single PHP-version job (no startsWith( github.repository, 'WordPress/' ) wrapper and no fork-only job), so only the simple form of the condition applies.
• test-build-processes.yml: updated the if: condition on the test-core-build-process job. The test-core-build-process-macos job in this file uses a different, unrelated condition (github.repository == 'WordPress/wordpress-develop' only, no pull_request fallback) and was left untouched, per the scope rules.

The following files from the original commit do not exist on the 4.7 branch at all and were skipped entirely: end-to-end-tests.yml, javascript-type-checking.yml, performance.yml, php-compatibility.yml, phpstan-static-analysis.yml, test-and-zip-default-themes.yml, upgrade-develop-testing.yml, workflow-lint.yml. None of these (or an equivalent under a different name) exist on this branch, so there was nothing to map the change to. The uses: .../@trunk to uses: ./... conversion (originally done in upgrade-develop-testing.yml and workflow-lint.yml) does not apply here since neither file exists on this branch.

No Slack-notification jobs, and no workflows outside the scope of the original commit, were modified.

Use of AI Tools

This pull request was created by an AI agent (Claude Code). Until this PR is marked "Ready for Review", treat it as untrusted, AI-created code that requires a manual review by a human team member.

[github-actions]

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