refactor(workflows): use environment variable for Docker image tags

Author: mansaj

.github/workflows/docker_build_deploy_v2.yml

@@ -68,13 +68,15 @@ jobs:
 
       - name: Build and push Docker image to GAR
         id: build-and-push
+        env:
+          TAGS: ${{ steps.meta.outputs.tags }}
         uses: docker/build-push-action@v6
         with:
           context: .
           # Push is true to push to GAR after build
           push: true
           # Tags generated by the metadata action (only GAR tag)
-          tags: ${{ steps.meta.outputs.tags }}
+          tags: ${{ env.TAGS }}
           # Pass build arguments
           build-args: |
             SENTRY_RELEASE=${{ github.sha }} # Use full SHA for Sentry release clarity