github: fix caching the docker images

This commit updates the way docker cache is created by including the
current date into the cache key. Now when "save-always" option in
actions/cache is deprecated [1] this seems to be the conventional
way [2] to create the cache.

[1] actions/cache#1452
[2] https://github.com/actions/cache?tab=readme-ov-file#creating-a-cache-key

Signed-off-by: Mikhail Koviazin <mikhail.koviazin@aiven.io>

Author: mkmkme

.github/workflows/integration.yaml

@@ -50,8 +50,19 @@ jobs:
            pip install -r dev_requirements.txt
            invoke linters
 
+   get-date:
+    name: Get current date for cache
+    outputs:
+      current_date: ${{ steps.date.outputs.current_date }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set current date
+        id: date
+        run: echo "current_date=$(date -u +'%Y%m%d')" >> $GITHUB_OUTPUT
+
    populate-cache:
      runs-on: ubuntu-latest
+     needs: [get-date, dependency-audit, lint]
      timeout-minutes: 60
      name: Update docker cache
      steps:
@@ -61,8 +72,8 @@ jobs:
          uses: actions/cache@v4
          with:
            path: ./custom-cache/
-           key: custom-cache
-       - if: ${{ steps.custom-cache.outputs.cache-hit != 'true' || github.event_name == 'schedule' }}
+           key: custom-cache-${{ needs.get-date.outputs.current_date }}
+       - if: ${{ steps.custom-cache.outputs.cache-hit != 'true' }}
          name: Update Cache
          run: |
            mkdir -p ./custom-cache/
@@ -72,7 +83,7 @@ jobs:
 
    run-tests:
      runs-on: ubuntu-latest
-     needs: [populate-cache]
+     needs: [populate-cache, get-date]
      timeout-minutes: 60
      strategy:
        max-parallel: 15
@@ -98,7 +109,7 @@ jobs:
          with:
            path: ./custom-cache/
            fail-on-cache-miss: true
-           key: custom-cache
+           key: custom-cache-${{ needs.get-date.outputs.current_date }}
        - name: Use Cache
          run: docker image load -i ./custom-cache/all.tar
 
@@ -137,7 +148,7 @@ jobs:
    build_and_test_package:
     name: Validate building and installing the package
     runs-on: ubuntu-latest
-    needs: [run-tests]
+    needs: [run-tests, get-date, populate-cache]
     strategy:
       fail-fast: false
       matrix:
@@ -154,7 +165,7 @@ jobs:
         with:
           path: ./custom-cache/
           fail-on-cache-miss: true
-          key: custom-cache
+          key: custom-cache-${{ needs.get-date.outputs.current_date }}
       - name: Use Cache
         run: docker image load -i ./custom-cache/all.tar