After discussion in the doris community @apache/doris-committers , we limit the PR to be merged only after at least two people approve it.↳
We can try to run it for a while first, and if everyone gives good feedback, we can use this as a mandatory check.
Since the merge must be approved by at least one committer, we only need to judge whether there are two approves, and we don't need to care about the identity of the approve.
When there is a request change, if the other party is a committer, the committer dismiss is required when merging, which is enforced by github, so we don't need to care.
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