create builder to use for multiarch

Signed-off-by: Kevin <kpostlet@redhat.com>

Makefile

@@ -331,14 +331,20 @@ importer-image: PLATFORMS=linux/amd64
 importer-image: PUSH=--load
 importer-image: importer-image-build
 
+# Build multiarch kueue-viz image locally
+.PHONY: local-kueue-viz-image-build
+local-kueue-viz-image-build:
+	BUILDER=$(shell $(DOCKER_BUILDX_CMD) create --use)
+	$(MAKE) kueue-viz-image-build PUSH=$(PUSH)
+	$(DOCKER_BUILDX_CMD) rm $$BUILDER
 
 # Build the kueue-viz dashboard images (frontend and backend)
 .PHONY: kueue-viz-image-build
 kueue-viz-image-build:
 	$(IMAGE_BUILD_CMD) \
 		-t $(IMAGE_REGISTRY)/kueue-viz-backend:$(GIT_TAG) \
 		-t $(IMAGE_REGISTRY)/kueue-viz-backend:$(RELEASE_BRANCH)-latest \
-		--platform=$(VIZ_PLATFORMS) \
+		--platform=$(PLATFORMS) \
 		--build-arg BASE_IMAGE=$(BASE_IMAGE) \
 		--build-arg BUILDER_IMAGE=$(BUILDER_IMAGE) \
 		--build-arg CGO_ENABLED=$(CGO_ENABLED) \
@@ -347,7 +353,7 @@ kueue-viz-image-build:
 	$(IMAGE_BUILD_CMD) \
 		-t $(IMAGE_REGISTRY)/kueue-viz-frontend:$(GIT_TAG) \
 		-t $(IMAGE_REGISTRY)/kueue-viz-frontend:$(RELEASE_BRANCH)-latest \
-		--platform=$(VIZ_PLATFORMS) \
+		--platform=$(PLATFORMS) \
 		$(PUSH) \
 		-f ./cmd/experimental/kueue-viz/frontend/Dockerfile ./cmd/experimental/kueue-viz/frontend; \