#6063: Fix targeting choice with iNarcs

[SJuliez]

Prevents calling getPosition() on INarcPods; use BrushOffAttackAction
This would only become apparent when an iNarc-ed unit had the iNarc pod and another target in its own hex for a physical attack
Fixes #6063

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.07%. Comparing base (ab3b4b4) to head (dde30ed).
Report is 21 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6115      +/-   ##
============================================
- Coverage     29.07%   29.07%   -0.01%     
  Complexity    13970    13970              
============================================
  Files          2601     2601              
  Lines        267448   267456       +8     
  Branches      47758    47761       +3     
============================================
  Hits          77764    77764              
- Misses       185788   185796       +8     
  Partials       3896     3896              

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