[fix] ci: cache is not overwritten (#5089)

Due to current limitations of `actions/cache`, the cache cannot be overwritten.
In our case, we need to accumulate cached wheels from different architectures.
To solve this, we simply delete the key before storing the cache again.

.github/workflows/container.yml

@@ -121,6 +121,8 @@ jobs:
     permissions:
       # Organization GHCR
       packages: write
+      # Clean key cache step
+      actions: write
 
     outputs:
       docker_tag: ${{ steps.build.outputs.docker_tag }}
@@ -144,8 +146,9 @@ jobs:
           restore-keys: "python-${{ env.PYTHON_VERSION }}-${{ runner.arch }}-"
           path: "./local/"
 
-      - name: Setup cache container mounts
-        uses: actions/cache@v4
+      - name: Restore cache container mounts
+        id: cache-container-mounts
+        uses: actions/cache/restore@v4
         with:
           key: "container-mounts-${{ hashFiles('./container/*.dockerfile') }}"
           restore-keys: "container-mounts-"
@@ -153,6 +156,14 @@ jobs:
             /var/tmp/buildah-cache/
             /var/tmp/buildah-cache-*/
 
+      # https://github.com/actions/cache/pull/1308
+      - if: steps.cache-container-mounts.outputs.cache-hit == 'true'
+        name: Clean key cache container mounts
+        continue-on-error: true
+        env:
+          GH_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        run: gh cache delete container-mounts-${{ hashFiles('./container/*.dockerfile') }}
+
       - if: ${{ matrix.emulation }}
         name: Setup QEMU
         uses: docker/setup-qemu-action@v3
@@ -170,6 +181,15 @@ jobs:
           OVERRIDE_ARCH: "${{ matrix.arch }}"
         run: make podman.build
 
+      - if: always()
+        name: Save cache container mounts
+        uses: actions/cache/save@v4
+        with:
+          key: "container-mounts-${{ hashFiles('./container/*.dockerfile') }}"
+          path: |
+            /var/tmp/buildah-cache/
+            /var/tmp/buildah-cache-*/
+
   test:
     name: Test (${{ matrix.arch }})
     runs-on: ${{ matrix.os }}