[primer] Allow primer comment job to recreate venv

[jacobtylerwalls]

Type of Changes

	Type
✓	🐛 Bug fix

Description

If five days elapse without a commit on main, the artifacts created by the last primer / main job are still around, and can be used by the compare job, but the compare job will fail because the venv it needs will likely have been evicted in the meantime because we cache so much and are constantly running low on space.

The solve here is to just let the compare job recreate the venv. I tested by rerunning the primer / main job, and without even waiting for it to finish, I could rerun this failing primer / comment job, and it succeeded.

Refs #9419 (comment)

[Pierre-Sassoulas]

Amazing !

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c2294be) 95.80% compared to head (923b4f8) 95.80%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9427   +/-   ##
=======================================
  Coverage   95.80%   95.80%           
=======================================
  Files         173      173           
  Lines       18775    18776    +1     
=======================================
+ Hits        17988    17989    +1     
  Misses        787      787           

see 2 files with indirect coverage changes