move runtime apt installs to new function

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 36.84211% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 73.02%. Comparing base (47f3d64) to head (331d0f1). Report is 11 commits behind head on main.

Files	Patch %	Lines
src/ibek/support_cmds/commands.py	36.84%	12 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #189 +/- ## ========================================== - Coverage 73.11% 73.02% -0.10% ========================================== Files 17 17 Lines 904 912 +8 ========================================== + Hits 661 666 +5 - Misses 243 246 +3 ```

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