Garbate collector: Free disk space from inactive VM

[olethanh]

Add a script to manually list and remove volume linked to inactive VM. It fetches data from the scheduler and pyaleph main's node as to fetch information on the status of the VM. Then display them to the user to determine if they can be removed safely.

JIRA ticket ALEPH-37

This solution is a stop gap to run manualy till we have more confident in it and can automatically run it in the background

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 78 lines in your changes missing coverage. Please review.

Project coverage is 62.16%. Comparing base (cc47d58) to head (a105758).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/aleph/vm/garbage_collector.py	0.00%	78 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #746      +/-   ##
==========================================
- Coverage   62.90%   62.16%   -0.75%     
==========================================
  Files          74       75       +1     
  Lines        6540     6618      +78     
  Branches      541      554      +13     
==========================================
  Hits         4114     4114              
- Misses       2262     2340      +78     
  Partials      164      164              

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