feat(sdk): add archive, unarchive, and delete run methods and tidy docstrings

[droctothorpe]

Description of your changes:
The PR adds archive_run, unarchive_run, and delete_run methods to the Client class. It just consumes the associated methods in the Python client. No additional logic. Please let me know if you'd like me to add it the v1 client as well.

It also tidies up some of the type hints and docstrings.

Once this is merged, I can contribute a discrete PR to update this test and potentially others that don't clean up artifacts.

Checklist:

• The title for your pull request (PR) should follow our title convention. Learn more about the pull request title convention used in this repository.

[google-oss-prow]

Hi @droctothorpe. Thanks for your PR.

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[connor-mccarthy]

/test all

[connor-mccarthy]

Thanks for your contribution, Alex. Just a few notes.

[connor-mccarthy]

Thanks, Alex. Just a few more change suggestions and a question for @ji-yaqi.

[connor-mccarthy]

/test all

[connor-mccarthy]

/approve
/lgtm

Thanks @droctothorpe! Glad to get this merged :).

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: connor-mccarthy

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[droctothorpe]

Thanks, @connor-mccarthy. Really appreciate all of the insightful feedback!