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.

git-svn-id: https://develop.svn.wordpress.org/trunk@57362 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/javascript-tests.yml

@@ -67,7 +67,7 @@ jobs:
           show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
 
       - name: Set up Node.js
-        uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
+        uses: actions/setup-node@b39b52d1213e96004bfcb1c61a8a6fa8ab84f3e8 # v4.0.1
         with:
           node-version-file: '.nvmrc'
           cache: npm