Use build cache for passing GCC image

Author: Bronek

.github/workflows/debian.yml

@@ -19,7 +19,7 @@ defaults:
 env:
   CONTAINER_REGISTRY: ghcr.io
   BUILDKIT_PROGRESS: plain
-  LOCAL_GCC_IMAGE: localhost.localdomain/gcc
+  LOCAL_GCC_IMAGE: ghcr.io/debian-gcc
   CONAN_VERSION: 2.19.1
   GCOVR_VERSION: 8.3
   CMAKE_VERSION: 3.31.6
@@ -106,6 +106,7 @@ jobs:
           outputs: type=image,name=${{ env.LOCAL_GCC_IMAGE }},push=false
           platforms: ${{ matrix.architecture.platform }}
           provenance: mode=max
+          cache-to: type=local,dest=${{ runner.temp }}/cache
           push: false
           sbom: true
           tags: ${{ format('{0}:{1}-{2}', env.LOCAL_GCC_IMAGE, matrix.os.compiler_version, matrix.os.release) }}
@@ -143,6 +144,7 @@ jobs:
           outputs: type=image,name=${{ env.CONTAINER_IMAGE }},push-by-digest=true,name-canonical=true,push=true
           platforms: ${{ matrix.architecture.platform }}
           provenance: mode=max
+          cache-from: type=local,src=${{ runner.temp }}/cache
           push: ${{ github.ref_type == 'branch' && github.ref_name == github.event.repository.default_branch }}
           sbom: true
           labels: ${{ steps.meta.outputs.labels }}