To make our release process easier, I plan to mark milestone
and label is required before the PR merged, they use for
* label: In this path we required label with at least on with
'feature|bug|improvement|document|chore' to make our changelog
more convenient
* milestone: For easier to cherry-pick PR, currently some of
our milestone only exists in issue and not exists in related
PR, it may
mergable some time will become crazy and adding
or deleting labels in the PR. This affects the
user experience. I try to solve it in #7099 but
it is seems not affect and we should remove the
label and comment operation and only should the
result in check result.