fix(scope-manager): correct decorators(.length) check in ClassVisitor for methods#7334

JoshuaKGoldberg merged 3 commits intotypescript-eslint:maintypescript-eslint/typescript-eslint:mainfrom

JoshuaKGoldberg:class-visitor-method-decorators-checkJoshuaKGoldberg/typescript-eslint:class-visitor-method-decorators-checkCopy head branch name to clipboard