After “ tiup cluster prune” ，the data in tombstone is removed but tiup does not clean the corresponding data in PD

[qqqdan]

Feature Request

Is your feature request related to a problem? Please describe:

After “ tiup cluster prune” ，the data in tombstone is removed but tiup does not clean the corresponding data in PD。

Describe the feature you'd like:

Suggest to use pd control to execute "store remove-tombstone " to clean the useless info.

Why the featue is needed:

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy: