refactor: remove redundant pre-building of imagesin backend testing workflow

.github/workflows/test-backend.yml

@@ -21,48 +21,6 @@ jobs:
           filters: .github/file-filters.yml
           list-files: shell
 
-  build_test_neo4j:
-    name: Docker Build Test - Neo4J
-    if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
-    needs: files-changed
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
-
-      - name: Neo4J | Build 'community' image
-        run: |
-          docker build --target community -t "ocelotsocialnetwork/neo4j-community:test" neo4j/
-          docker save "ocelotsocialnetwork/neo4j-community:test" > /tmp/neo4j.tar
-      
-      - name: Cache docker images
-        id: cache-neo4j
-        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
-        with:
-          path: /tmp/neo4j.tar
-          key: ${{ github.run_id }}-backend-neo4j-cache
-
-  build_test_backend:
-    name: Docker Build Test - Backend
-    if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
-    needs: files-changed
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.1.7
-
-      - name: backend | Build 'test' image
-        run: |
-          docker build --target test -t "ocelotsocialnetwork/backend:test" backend/
-          docker save "ocelotsocialnetwork/backend:test" > /tmp/backend.tar
-      
-      - name: Cache docker images
-        id: cache-backend
-        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.0.2
-        with:
-          path: /tmp/backend.tar
-          key: ${{ github.run_id }}-backend-cache
-
   lint_backend:
     name: Lint Backend
     if: needs.files-changed.outputs.backend == 'true'
@@ -78,7 +36,7 @@ jobs:
   unit_test_backend:
     name: Unit tests - Backend
     if: needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true'
-    needs: [files-changed, build_test_neo4j, build_test_backend]
+    needs: [files-changed]
     runs-on: ubuntu-latest
     permissions: 
       checks: write
@@ -112,7 +70,6 @@ jobs:
           cp backend/.env.template backend/.env
 
       - name: backend | docker compose
-        # doesn't work without the --build flag - this either means we should not load the cached images or cache the correct image
         run: docker compose -f docker-compose.yml -f docker-compose.test.yml up --detach backend --build
 
       - name: backend | Initialize Database
@@ -123,21 +80,3 @@ jobs:
 
       - name: backend | Unit test incl. coverage check
         run: docker compose exec -T backend yarn test
-
-  cleanup:
-    name: Cleanup
-    if: ${{ needs.files-changed.outputs.backend == 'true' || needs.files-changed.outputs.docker == 'true' }}
-    needs: [files-changed, unit_test_backend]
-    runs-on: ubuntu-latest
-    permissions: write-all
-    continue-on-error: true
-    steps:
-      - name: Delete cache
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          gh extension install actions/gh-actions-cache
-          KEY="${{ github.run_id }}-backend-neo4j-cache"
-          gh actions-cache delete $KEY -R Ocelot-Social-Community/Ocelot-Social --confirm
-          KEY="${{ github.run_id }}-backend-cache"
-          gh actions-cache delete $KEY -R Ocelot-Social-Community/Ocelot-Social --confirm