Experiment green tea build for nodeup

See github.com/golang/go/issues/73581 for more details about the feature.

Signed-off-by: Arnaud Meukam <[email protected]>

Author: ameukam

Makefile

@@ -214,7 +214,7 @@ crossbuild: crossbuild-kops-linux-amd64 crossbuild-kops-linux-arm64 crossbuild-k
 .PHONY: nodeup-amd64 nodeup-arm64
 nodeup-amd64 nodeup-arm64: nodeup-%:
 	mkdir -p ${DIST}/linux/$*
-	GOOS=linux GOARCH=$* go build ${GCFLAGS} ${BUILDFLAGS} ${EXTRA_BUILDFLAGS} -o ${DIST}/linux/$*/nodeup ${LDFLAGS}"${EXTRA_LDFLAGS} -X k8s.io/kops.Version=${VERSION} -X k8s.io/kops.GitVersion=${GITSHA}" k8s.io/kops/cmd/nodeup
+	GOEXPERIMENT=greenteagc GOOS=linux GOARCH=$* go build ${GCFLAGS} ${BUILDFLAGS} ${EXTRA_BUILDFLAGS} -o ${DIST}/linux/$*/nodeup ${LDFLAGS}"${EXTRA_LDFLAGS} -X k8s.io/kops.Version=${VERSION} -X k8s.io/kops.GitVersion=${GITSHA}" k8s.io/kops/cmd/nodeup
 
 .PHONY: nodeup
 nodeup: nodeup-amd64