Add paginated test case for the listCollaborators API

[todo]

https://github.com/tidb-community-bots/ti-community-bot/blob/a9db0cd060b3d5c63fc4f991de35c9c4ff38877d/src/api/pull/index.ts#L86-L91

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This issue was generated by todo based on a TODO comment in a9db0cd. It's been assigned to @Mini256 because they committed the code.

[ti-chi-bot]

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[ti-chi-bot]

Stale issues rot after 30d of inactivity.
Mark the issue as fresh with /remove-lifecycle rotten.
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