Summary of changes:
- created .github/CODEOWNERS with docs and config similar to the one in .pullapprove.yml
- updated docs
- updated .github/angular-robot.yml to not expect pullapprove status
- removed .pullapprove.yml
The primary motivations behind this change are:
- CODEOWNERS didn't exist when we introduced pullapprove
- CODEOWNERS is a functionality tightly integrated with github which results in better DX
- pullapprove v2 has been very unstable recently causing productivity loss
- pullapprove v2 has been deprecated in favor of v3, which requires and migration
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