create builder to use for multiarch

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

Makefile

@@ -28,7 +28,6 @@ GIT_TAG ?= $(shell git describe --tags --dirty --always)
 # Image URL to use all building/pushing image targets
 PLATFORMS ?= linux/amd64,linux/arm64,linux/s390x,linux/ppc64le
 CLI_PLATFORMS ?= linux/amd64,linux/arm64,darwin/amd64,darwin/arm64
-VIZ_PLATFORMS ?= linux/amd64,linux/arm64,linux/s390x,linux/ppc64le
 DOCKER_BUILDX_CMD ?= docker buildx
 IMAGE_BUILD_CMD ?= $(DOCKER_BUILDX_CMD) build
 IMAGE_BUILD_EXTRA_OPTS ?=
@@ -331,14 +330,14 @@ importer-image: PLATFORMS=linux/amd64
 importer-image: PUSH=--load
 importer-image: importer-image-build
 
-
 # Build the kueue-viz dashboard images (frontend and backend)
 .PHONY: kueue-viz-image-build
 kueue-viz-image-build:
+	BUILDER=$(shell $(DOCKER_BUILDX_CMD) create --use)
 	$(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) \
@@ -347,17 +346,17 @@ 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; \
+	$(DOCKER_BUILDX_CMD) rm $$BUILDER
 
 .PHONY: kueue-viz-image-push
 kueue-viz-image-push: PUSH=--push
 kueue-viz-image-push: kueue-viz-image-build
 
 # Build a docker local us-central1-docker.pkg.dev/k8s-staging-images/kueue/kueue-viz image
 .PHONY: kueue-viz-image
-kueue-viz-image: VIZ_PLATFORMS=linux/amd64
 kueue-viz-image: PUSH=--load
 kueue-viz-image: kueue-viz-image-build