Handle no installed dkms modules (BugFix)

[jocave]

Description

The "test_main_*" tests did not actually exercise anything because all calls where mocked and there wasnt any input provided.

The case where there was no dkms modules at all the system was not handled. Add a call_count on test main to ensure this addition wasnt skipping the apt log checking.

Resolved issues

Documentation

Tests

Additional unittests with input from more release

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.20%. Comparing base (7b00249) to head (9c7fb71).
Report is 118 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1426   +/-   ##
=======================================
  Coverage   45.20%   45.20%           
=======================================
  Files         367      367           
  Lines       39125    39129    +4     
  Branches     6614     6615    +1     
=======================================
+ Hits        17688    17690    +2     
- Misses      20764    20765    +1     
- Partials      673      674    +1     

Flag	Coverage Δ
provider-sru	97.97% <100.00%> (-2.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[Hook25]

+1, tyvm for the new tests as well