Build/Test Tools: Update third-party GitHub Actions.

This updates the following third-party GitHub Actions to their latest versions:

- `actions/setup-node` from `3.8.1` to `4.0.1`
- `actions/upload-artifact` from `3.1.2` to `4.3.0`
- `shivammathur/setup-php` from `2.28.0` to `2.29.0`
- `actions/cache` from `3.3.2` to `4.0.0`
- `codecov/codecov-action` from `3.1.4` to `3.1.5`

Most notably, these updates silence newly encountered notices as a result of GitHub beginning to transition away from Node.js 16 to Node.js 20 (see https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/).

Props swissspidy.
See #59805.
Built from https://develop.svn.wordpress.org/trunk@57362


git-svn-id: http://core.svn.wordpress.org/trunk@56868 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57361';
+$wp_version = '6.5-alpha-57362';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.