Fast fix for old version nodejs (ansible#15912)

* Fast fix for old version nodejs

Fixing error
required: { node: '^18.0.0 || >=20.0.0' },
current: { node: 'v16.13.1', npm: '8.5.0' }

* Use node js 18 by default to align with official docs

---------

Co-authored-by: Seth Foster <[email protected]>

Author: temandroid

awx/ui/Makefile

@@ -87,7 +87,7 @@ ui/src/webpack: $(UI_DIR)/src/node_modules/webpack
 ## True target for ui/src/webpack.
 $(UI_DIR)/src/node_modules/webpack:
 	@echo "=== Installing webpack ==="
-	@cd $(UI_DIR)/src && npm install webpack
+	@cd $(UI_DIR)/src && n 18 && npm install webpack
 
 .PHONY: clean/ui
 ## Clean ui