[Feature] Support for querying the trash used capacity

[BiteTheDDDDt]

Is your feature request related to a problem? Please describe.
Sometimes, garbage data will accumulate and take up a lot of space, but users don't know it.

Describe the solution you'd like
Add a query for display trash used capacity.
query format:
show trash;
show trash on "BackendHost:BackendHeartBeatPort";
Describe alternatives you've considered
Users can manually delete trash after noticing that trash takes up a lot of space

Additional context