Build/Test Tools: Don’t install Gutenberg for E2E tests in 6.4.

The minimum required version of WordPress for the Gutenberg plugin was recently raised to 6.5.

This updates the 6.4 branch to skip installing and activating Gutenberg during E2E testing as has already been done for older branches.

See #61530.

git-svn-id: https://develop.svn.wordpress.org/branches/6.4@59212 602fd350-edb4-49c9-b593-d223f7449a82

Author: desrosj

.github/workflows/end-to-end-tests.yml

@@ -48,6 +48,7 @@ jobs:
         LOCAL_SCRIPT_DEBUG: [ true, false ]
     with:
       LOCAL_SCRIPT_DEBUG: ${{ matrix.LOCAL_SCRIPT_DEBUG }}
+      install-gutenberg: false
 
   slack-notifications:
     name: Slack Notifications