Smoke test for Copilot CLI via chat extension in editor window (#317140)

* Copilot CLI sanity testing

* Make things better

* see if 1.0.48 correctly fails

* Try to be smarter with git auth

* Test  if copilot cli sanity test auth correctly.

* Test if copilot cli sanity test FAILS correctly

* Try to get sanity tests pass?

* Copilot CLI from chat extension sanity test

* Try more smoke test for copilot cli

* More smoke test related things?

* title is messing with chat disabled..?

* Why is there timeout for .editor-instance .interactive-session

* add copilot cli ui smoke auth diagnostics

* Be more descriptive when copilot cli smoke test fail

* remove integration test, upgrade smoke test

* Clean up Copilot CLI smoke test diagnostics

* Get even more inspiration from agent smoke test