Build/Test Tools: Allow changes to the code coverage workflow to run on pull request.

This adds the `pull_request` event to the Code Coverage Report workflow, allowing changes to be verified in a pull request before being committed.

The `branches` and `paths` filters are used to limit when the workflow runs to pull requests with:

- A base branch of `trunk`.
- Changing specific files that can potentially affect the way a coverage report is generated.

Reports generated on `pull_request` events are for testing purposes only and are not submitted to Codecov.

The `docker-compose.yml` file has also been added to the `paths` filter for both `push` and `pull_request` events. Changes to this file could potentially affect the environment used to generate the report (such as the ones in [53552]).

Props afragen, johnbillion, desrosj.
See #55652.
Built from https://develop.svn.wordpress.org/trunk@53553


git-svn-id: http://core.svn.wordpress.org/trunk@53142 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53552';
+$wp_version = '6.1-alpha-53553';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.