Revert "Tmp: switch to dedicated test suite branch in CI"

This reverts commit 95cc35f.

Author: sd109

.github/workflows/pull-request.yml

@@ -76,7 +76,6 @@ jobs:
         uses: actions/checkout@v3
         with:
           repository: stackhpc/s3-active-storage-compliance-suite
-          ref: feat/reductions-over-axes
           path: compliance
 
       - name: Setup python