RHOAIENG-16149: chore(Makefile) download arch-appropriate version of kubectl (#779)

Author: jiridanek

Makefile

@@ -16,6 +16,9 @@ else
 	WHERE_WHICH ?= which
 endif
 
+# linux/amd64 or darwin/arm64
+OS_ARCH=$(shell go env GOOS)/$(shell go env GOARCH)
+
 IMAGE_TAG		 ?= $(RELEASE)_$(DATE)
 KUBECTL_BIN      ?= bin/kubectl
 KUBECTL_VERSION  ?= v1.23.11
@@ -404,7 +407,7 @@ rocm-runtime-tensorflow-ubi9-python-3.11: rocm-ubi9-python-3.11
 bin/kubectl:
 ifeq (,$(wildcard $(KUBECTL_BIN)))
 	@mkdir -p bin
-	@curl -sSL https://dl.k8s.io/release/$(KUBECTL_VERSION)/bin/linux/amd64/kubectl > \
+	@curl -sSL https://dl.k8s.io/release/$(KUBECTL_VERSION)/bin/$(OS_ARCH)/kubectl > \
 		$(KUBECTL_BIN)
 	@chmod +x $(KUBECTL_BIN)
 endif