Missing `gi_suspended` coverage in inspect comments and `generator/coroutine` tests

[hyongtao-code]

Some inspect documentation and generator/coroutine tests do not reference or validate gi_suspended / cr_suspended, even though the attribute exists and is exposed.

This issue tracks adding minimal comments and test coverage for completeness.

Linked PRs

• gh-144085: Add gi_suspended to inspect comments and generator/coroutine tests #144086
• [3.14] gh-144085: Add {gi,cr}_suspended to inspect comments and generator/coroutine tests (GH-144086) #144104
• [3.13] gh-144085: Add {gi,cr}_suspended to inspect comments and generator/coroutine tests (GH-144086) #144134