fix(typescript-estree): only create project service from env setting if project is enabled#8136

JoshuaKGoldberg merged 2 commits intotypescript-eslint:maintypescript-eslint/typescript-eslint:mainfrom

JoshuaKGoldberg:project-service-only-if-neededJoshuaKGoldberg/typescript-eslint:project-service-only-if-neededCopy head branch name to clipboard