ci: revert to working cache location

.github/workflows/pr_github_validation.yaml

@@ -32,7 +32,7 @@ jobs:
     name: Build and Test - ${{ matrix.framework }}
     env:
       CONTAINER_ID: test_${{ github.run_id }}_${{ github.run_attempt }}_${{ github.job }}_${{ matrix.framework }}
-      IMAGE_TAG: ghcr.io/dynemo-ai/dynemo:pr${{ github.event.pull_request.number}}-${{ matrix.framework }}
+      IMAGE_TAG: ghcr.io/dynemo-ai/dynemo:pr_${{ github.event.pull_request.number}}_${{ matrix.framework }}
       PYTEST_XML_FILE: pytest_test_report.xml
     steps:
       - name: Checkout repository
@@ -63,7 +63,7 @@ jobs:
       - name: Build image
         env:
           CACHE_FROM: "type=registry,ref=${{ steps.which_cache.outputs.cache_from_location }}"
-          CACHE_TO: "type=inline,ref=${{ steps.which_cache.outputs.cache_to_location }}"
+          CACHE_TO: "type=registry,ref=${{ steps.which_cache.outputs.cache_to_location }},image-manifest=true,mode=max"
         run: |
           ./container/build.sh --tag $IMAGE_TAG --framework ${{ matrix.framework }} --cache-from "${{ env.CACHE_FROM }}" --cache-to "${{ env.CACHE_TO }}"
       - name: Run pytest