fix(release): do not delete testdata from git history in release work…

…flow

Makefile

@@ -73,7 +73,7 @@ destroy: ## Run `zarf destroy` on the current cluster
 	rm -fr build
 
 delete-packages: ## Delete all Zarf package tarballs in the project recursively
-	find . -type f -name 'zarf-package-*' -delete
+	find . -type f -name 'zarf-package-*' -not -path '*/testdata/*' -print -delete
 
 # Note: the path to the main.go file is not used due to https://github.com/golang/go/issues/51831#issuecomment-1074188363
 .PHONY: build