Automatic raises performance degration issues to the databend repo

[flaneur2020]

we've got databend-perf to discovery the performance degrations in databend. but the performance degration are mainly discovered by human-eyes, we can try raising github issues on the databend repo by a bot on getting performance degration.

Caveats

• only raise issues when the degration is obvious (like +10%) to reduce noise.
• only raise issues on scheduled perf tests, not raises on Pull Request workflows