Use PCOV preinstalled within PHP Docker container

[desrosj]

This switches from manually installing PCOV within the relevant GitHub Actions workflows to relying on the local Docker environment containers to have PCOV already pre-installed.

This is also being used to test WordPress/wpdev-docker-images#210, which adds PCOV to the containers.

Follow up to r62409.

Trac ticket: Core-644893.

Use of AI Tools

AI assistance: No

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[github-actions]

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Props desrosj.

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[desrosj]

This is temporary to test the upstream container PR and will not be included in the eventual commit.

[desrosj]

This is temporary to test the upstream container PR and will not be included in the eventual commit.

[github-actions]

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[Copilot]

Pull request overview

This PR updates the local Docker environment and CI workflow to rely on PCOV being preinstalled in the Docker images (instead of installing it during GitHub Actions runs), and wires a LOCAL_PHP_PCOV flag through the environment to control coverage-related behavior.

Changes:

• Remove the GitHub Actions step that installs/enables PCOV via PECL, and instead pass a LOCAL_PHP_PCOV flag when coverage is requested.
• Add PCOV tuning (pcov.initial.files) to the local PHP INI and inject pcov.directory when running PHPUnit with clover coverage.
• Switch local-env Docker images to ghcr.io/wordpress/wpdev-docker-images/* with a -210 tag and expose LOCAL_PHP_PCOV to containers.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tools/local-env/scripts/docker.js	Adds logic to inject pcov.directory into PHPUnit coverage runs (currently breaks the php ./vendor/bin/phpunit invocation pattern).
tools/local-env/php-config.ini	Adds pcov.initial.files=10000 to tune PCOV performance.
docker-compose.yml	Switches PHP/CLI images to ghcr.io/wordpress/wpdev-docker-images/* (tagged -210) and passes LOCAL_PHP_PCOV into containers.
.github/workflows/reusable-phpunit-tests-v3.yml	Passes LOCAL_PHP_PCOV for coverage runs and removes the manual PCOV install step.
.env.example	Documents the new LOCAL_PHP_PCOV environment variable.

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