Rename to Go flags

Author: Nicholas Thomson

Makefile

@@ -16,8 +16,8 @@ GO_LDFLAGS=-ldflags "-X $(IMPORT_PATH)/pkg/version.Version=$(VERSION) \
 
 # We need to use the codegen tag when building and testing because the
 # aws-sdk-go/private/model/api package is gated behind a build tag "codegen"...
-GO_TAGS=-tags codegen
-GO_LOCAL_TAGS=-modfile=go.local.mod $(GO_TAGS)
+GO_CMD_FLAGS=-tags codegen
+GO_CMD_LOCAL_FLAGS=-modfile=go.local.mod $(GO_CMD_FLAGS)
 
 .PHONY: all local-build-ack-generate build-ack-generate local-build-controller \
 	build-controller test local-test build-controller-image \
@@ -27,12 +27,12 @@ all: test
 
 build-ack-generate:	## Build ack-generate binary
 	@echo -n "building ack-generate ... "
-	@go build ${GO_TAGS} ${GO_LDFLAGS} -o bin/ack-generate cmd/ack-generate/main.go
+	@go build ${GO_CMD_FLAGS} ${GO_LDFLAGS} -o bin/ack-generate cmd/ack-generate/main.go
 	@echo "ok."
 
 local-build-ack-generate:	## Build ack-generate binary using the local go.mod
 	@echo -n "building ack-generate ... "
-	@go build ${GO_LOCAL_TAGS} ${GO_LDFLAGS} -o bin/ack-generate cmd/ack-generate/main.go
+	@go build ${GO_CMD_LOCAL_FLAGS} ${GO_LDFLAGS} -o bin/ack-generate cmd/ack-generate/main.go
 	@echo "ok."
 
 build-controller: build-ack-generate ## Generate controller code for SERVICE
@@ -56,10 +56,10 @@ check-versions: ## Checks the code-generator version matches the runtime depende
 	@./scripts/check-versions.sh $(VERSION)
 
 test: 				## Run code tests
-	go test ${GO_TAGS} ./...
+	go test ${GO_CMD_FLAGS} ./...
 
 local-test:			## Run code tests using the local go.mod
-	go test ${GO_LOCAL_TAGS} ./...
+	go test ${GO_CMD_LOCAL_FLAGS} ./...
 
 help:           	## Show this help.
 	@grep -F -h "##" $(MAKEFILE_LIST) | grep -F -v grep | sed -e 's/\\$$//' \