refactor: refactoring to use simple ApiCollector

[sstojak1]

⚠️ Pre Checklist

Please complete ALL items in this checklist, and remove before submitting

• [ ] I have read through the Contributing Documentation.
• [ ] I have added relevant tests.
• [ ] I have added relevant documentation.
• [ ] I will add labels to the PR, such as pr-type/bug-fix, pr-type/feature-development, etc.

Summary

What does this PR do? PR collector is now using the simple ApiCollector.

Does this close any open issues?

Closes 7457

Screenshots

Include any relevant screenshots here.

Other Information

Any other information that is important to this PR. You can test this by creating a new Devlake Project that will scrape data from Bitbucket Server. What you should notice is that there won't be duplicate date in _raw_bitbucket_server_api_pull_requests table and that extractApiPullRequests won't slow down.

[sstojak1]

@klesh branch synced with master. It's ready to be merged