Repo(typescript-estree): Build out test cases using using fixtures for project service tests to reduce mocking #9641
Description
Suggestion
Follow up from #9306.
we should probably build out a test case using
typescript-estree/tests/fixturesthat allows us to do tests with project service without mocking out the entire world.
Project service test cases require quite a bit of mocking in createProjectService.test.ts. Suggestion is to build out test cases using fixtures to reduce the number of tsserver mocks.