adds ability to skip go mod download

Common.mk

@@ -372,6 +372,7 @@ DOCKER_USE_ID_FOR_LINUX=$(shell if [ "$$(uname -s)" = "Linux" ] && [ -n "$${USER
 GO_MOD_CACHE=$(shell source $(BUILD_LIB)/common.sh && build::common::use_go_version $(GOLANG_VERSION) > /dev/null 2>&1 && go env GOMODCACHE)
 GO_BUILD_CACHE=$(shell source $(BUILD_LIB)/common.sh && build::common::use_go_version $(GOLANG_VERSION) > /dev/null 2>&1 && go env GOCACHE)
 CGO_TARGET?=
+GO_MODS_VENDORED?=false
 ######################
 
 #### BUILD FLAGS ####
@@ -520,7 +521,7 @@ $(GIT_PATCH_TARGET): $(GIT_CHECKOUT_TARGET)
 $(REPO)/%ks-distro-go-mod-download: REPO_SUBPATH=$(if $(filter e,$*),,$(*:%/e=%))
 $(REPO)/%ks-distro-go-mod-download: $(if $(PATCHES_DIR),$(GIT_PATCH_TARGET),$(GIT_CHECKOUT_TARGET))
 	@echo -e $(call TARGET_START_LOG)
-	$(BASE_DIRECTORY)/build/lib/go_mod_download.sh $(MAKE_ROOT) $(REPO) $(GIT_TAG) $(GOLANG_VERSION) "$(REPO_SUBPATH)"
+	if [[ "$(GO_MODS_VENDORED)" == "false" ]]; then $(BASE_DIRECTORY)/build/lib/go_mod_download.sh $(MAKE_ROOT) $(REPO) $(GIT_TAG) $(GOLANG_VERSION) "$(REPO_SUBPATH)"; fi
 	@touch $@
 	@echo -e $(call TARGET_END_LOG)
 

projects/kubernetes/cloud-provider-aws/Makefile

@@ -16,6 +16,11 @@ BASE_IMAGE=$(GO_RUNNER_IMAGE)
 HAS_RELEASE_BRANCHES=true
 HAS_S3_ARTIFACTS=true
 
+# 1-28 and 1-29 includes patches that add the vendor directory
+# as well as one that modifies content inside the vendor directory
+# set to true to avoid downloading deps overwriting this change/patch
+RELEASE_BRANCHS_WITH_VENDORED=1-28 1-29
+GO_MODS_VENDORED=$(if $(filter $(RELEASE_BRANCH),$(RELEASE_BRANCHS_WITH_VENDORED)),true,false)
 EXTRA_GO_LDFLAGS=-X k8s.io/component-base/version.gitVersion=$(GIT_TAG)
 
 IMAGE_NAMES=cloud-controller-manager