TestRunner createTestController does not accept runHandler

[joyceerhl]

Testing #127386

The notebooks namespace provides createNotebookController with the following signature:

export function createNotebookController(id: string, notebookType: string, label: string, handler?: (cells: NotebookCell[], notebook: NotebookDocument, controller: NotebookController) => void | Thenable<void>): NotebookController;

Having used the notebooks API, I expected the test namespace's createTestController to also accept the runHandler as an optional parameter. Its current signature is

export function createTestController(id: string): TestController;

[connor4312]

Thanks for the issue, however I will close this as a duplicate since this method will be going away with some changes to the runner API in: #127096 (comment) These changes are staged and will be merged after this endgame.