Build/Test Tools: Various minor GitHub Action improvements.

This applies several types of improvements to GitHub Action workflows:
- Updates to inline documentation to ensure accuracy.
- Removal of repetitive or unnecessary debug logging.
- Reorganization of some steps to have configuration steps towards the beginning of jobs.
- Step name updates for consistency across workflows.

Props desrosj, jrf.
See #56793.

git-svn-id: https://develop.svn.wordpress.org/trunk@54851 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/javascript-tests.yml

@@ -43,10 +43,9 @@ jobs:
   #
   # Performs the following steps:
   # - Checks out the repository.
+  # - Sets up Node.js.
   # - Logs debug information about the GitHub Action runner.
-  # - Installs Node.js.
-  # - Logs updated debug information.
-  # _ Installs npm dependencies.
+  # - Installs npm dependencies.
   # - Run the WordPress QUnit tests.
   # - Ensures version-controlled files are not modified or deleted.
   test-js:
@@ -59,14 +58,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8 # v3.1.0
 
-      - name: Log debug information
-        run: |
-          npm --version
-          node --version
-          git --version
-          svn --version
-
-      - name: Install Node.js
+      - name: Set up Node.js
         uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516 # v3.5.1
         with:
           node-version-file: '.nvmrc'
@@ -76,8 +68,10 @@ jobs:
         run: |
           npm --version
           node --version
+          git --version
+          svn --version
 
-      - name: Install Dependencies
+      - name: Install npm Dependencies
         run: npm ci
 
       - name: Run QUnit tests