Fix __pycache__ directory removal in clean target

Replaces the use of 'find -delete' with 'find -exec rm -rf {} +' to ensure all __pycache__ directories are properly removed during the clean process.

Author: TheRealHaoLiu

Makefile

@@ -146,7 +146,7 @@ clean-api:
 	rm -rf build $(NAME)-$(VERSION) *.egg-info
 	rm -rf .tox
 	find . -type f -regex ".*\.py[co]$$" -delete
-	find . -type d -name "__pycache__" -delete
+	find . -type d -name "__pycache__" -exec rm -rf {} +
 	rm -f awx/awx_test.sqlite3*
 	rm -rf requirements/vendor
 	rm -rf awx/projects