Extend unload controller to unload all inactive controllers

[saikishor]

Description

It is tedious to unload controller one by one when you have a lot of controllers, so I thought having such an option is very handy for quick unloading

Is this user-facing behavior change?

NO, just adds a new option

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.51%. Comparing base (427cb38) to head (8c8178c).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3466      +/-   ##
==========================================
- Coverage   89.51%   89.51%   -0.01%     
==========================================
  Files         164      164              
  Lines       21269    21270       +1     
  Branches     1656     1656              
==========================================
  Hits        19040    19040              
- Misses       1529     1530       +1     
  Partials      700      700              

Flag	Coverage Δ
unittests	89.51% <ø> (-0.01%)	⬇️

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see 1 file with indirect coverage changes

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