ci: add separate cache for release branches (#5293)

Signed-off-by: Anant Sharma <[email protected]>

Author: nv-anants

.github/actions/docker-build/action.yml

@@ -115,7 +115,11 @@ runs:
           EXTRA_ARGS="--cache-to type=inline "
           EXTRA_ARGS+="--cache-from type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache "
           EXTRA_ARGS+="--cache-from type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:main-${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/} "
-          if [[ "$GITHUB_REF_NAME" == "main" ]]; then
+          EXTRA_ARGS+="--cache-from type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:release-${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache "
+          if [[ "$GITHUB_REF_NAME" =~ ^release ]]; then
+            # Release branches also use release cache
+            EXTRA_ARGS+="--cache-to type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:release-${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache,mode=max "
+          elif [[ "$GITHUB_REF_NAME" == "main" ]]; then
             EXTRA_ARGS+="--cache-to type=registry,ref=${ECR_HOSTNAME}/ai-dynamo/dynamo:${{ inputs.framework }}-cuda${CUDA_VERSION_MAJOR}-${PLATFORM##*/}-cache,mode=max "
           fi
         fi