Build/Test Tools: Always generate build ZIP on push for 6.4.

This updates the 6.5 branch to make use of [58345], which fixes a bug where a ZIP file with built WordPress is not saved as an artifact causing the performance workflow to fail.

Merges [53845] to the 6.4 branch.

Props jorbin.
See #59416.

git-svn-id: https://develop.svn.wordpress.org/branches/6.4@58347 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/test-build-processes.yml

@@ -51,13 +51,16 @@ jobs:
         os: [ ubuntu-latest, windows-latest ]
         directory: [ 'src', 'build' ]
         include:
-          # Only prepare artifacts for Playground once.
+          # Only prepare artifacts once.
           - os: ubuntu-latest
             directory: 'build'
-            prepare-playground: true
+            save-build: true
+            prepare-playground: ${{ github.event_name == 'pull_request' && true || '' }}
+
     with:
       os: ${{ matrix.os }}
       directory: ${{ matrix.directory }}
+      save-build: ${{ matrix.save-build && matrix.save-build || false }}
       prepare-playground: ${{ matrix.prepare-playground && matrix.prepare-playground || false }}
       test-emoji: false