[Feature Request] Support `remove-stale-label-after-reopen` option

[runlevel5]

Description:
In the edge case where developers want to resume working with the closed stale Pull Request, the developers would have to manually remove the stale label after re-opening the Pull Request.

It would be much better if this step can be automated.

Justification:
Less things to worry about for the developers. Improving their experiences with the pipeline workflow :)

Are you willing to submit a PR?
Sure!

[dsame]

Hello @runlevel5 , the feature request seems to be reasonable, but it still requires some time for estimations.

[runlevel5]

it still requires some time for estimations

What's the procedures here? Do I need to provide estimation?