When generating, delete only upstream targets (#2098)

Using `find .` will delete all files of the name, this has a wide
blast radius downstream. Limit the set of `find` directories to those
in upstream.

Signed-off-by: Todd Short <[email protected]>

Author: tmshort

Makefile

@@ -163,7 +163,7 @@ manifests: $(CONTROLLER_GEN) $(KUSTOMIZE) #EXHELP Generate WebhookConfiguration,
 
 .PHONY: generate
 generate: $(CONTROLLER_GEN) #EXHELP Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
-	@find . -name "zz_generated.deepcopy.go" -delete # Need to delete the files for them to be generated properly
+	@find api cmd hack internal -name "zz_generated.deepcopy.go" -delete # Need to delete the files for them to be generated properly
 	$(CONTROLLER_GEN) --load-build-tags=$(GO_BUILD_TAGS) object:headerFile="hack/boilerplate.go.txt" paths="./..."
 
 .PHONY: verify