Rename Upstream type to Backend (#10702)

Author: lgadban

Makefile

@@ -257,11 +257,17 @@ package-kgateway-chart: ## Package the new kgateway helm chart for testing
 clean:
 	rm -rf _output
 	rm -rf _test
-	rm -rf docs/site*
-	rm -rf docs/themes
-	rm -rf docs/resources
 	git clean -f -X install
 
+# Clean generated code
+# see hack/generate.sh for source of truth of dirs to clean
+.PHONY: clean-gen
+clean-gen:
+	rm -rf api/applyconfiguration
+	rm -rf pkg/generated/openapi
+	rm -rf pkg/client
+	rm -rf install/helm/kgateway/crds
+
 .PHONY: clean-tests
 clean-tests:
 	find * -type f -name '*.test' -exec rm {} \;
@@ -287,17 +293,9 @@ verify: generate-all  ## Verify that generated code is up to date
 .PHONY: generate-all
 generate-all: generated-code
 
-# Run codegen with debug logs
-# DEBUG=1 controls the debug level in the logger used by solo-kit
-# ref: https://github.com/solo-io/solo-kit/blob/main/pkg/code-generator/codegen/generator.go#L14
-# ref: https://github.com/solo-io/go-utils/blob/main/log/log.go#L14
-.PHONY: generate-all-debug
-generate-all-debug: export DEBUG = 1
-generate-all-debug: generate-all
-
 # Generates all required code, cleaning and formatting as well; this target is executed in CI
 .PHONY: generated-code
-generated-code: go-generate-all getter-check mod-tidy
+generated-code: clean-gen go-generate-all getter-check mod-tidy
 generated-code: update-licenses
 # generated-code: generate-crd-reference-docs
 generated-code: fmt