buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c cd ./contrib/kcp && CGO_ENABLED=0 GOCACHE=/root/.cache/go-build GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags \"-X github.com/platform-mesh/resource-broker/pkg/version.GitCommit=${GIT_COMMIT} -X github.com/platform-mesh/resource-broker/pkg/version.BuildTime=${BUILD_TIME}\" -o ../../bin/kcp-manager ./cmd" did not complete successfully: exit code: 1