Update Copilot CLI to 1.0.84-8 (#2662)

* Update Copilot CLI to 1.0.84-8

- Updated the shared CLI release pin
- Re-ran code generators
- Formatted generated code

* Fix Rust shutdown test after CLI schema update

Default newly added shutdown options in the E2E request initializer.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Stephen Toub <stoub@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: 3 people