Fix 3882: update Aerospace handling and reporting in MHQ

[Sleet01]

This fix cleans up the last extraneous UnitType.AERO case and comparison locations, excepting one or two that look to be useful for backward compatibility.

This will alleviate the issue seen in #3882 where ASF units are not properly accounted for in the Unit Rating Report, as well as preventing generation of new missions containing ASF forces as "ground" units (although existing missions in save files will not be affected).

Testing:

1. ran all three projects' unit tests,
2. updated failing MHQ unit tests to mock AeroSpaceFighter class instances instead of bare Aero instances.
3. ran the previously-failing Unit Rating report with saves provided by @Thom293 for issue [49.19 Nightly] ASF units are not being tracked correctly by MHQ/StratCon #3882.

Note: testing for this fix uncovered further issues in the RandomUnitGenerator and RATManager when dealing with ASFs; those will be fixed in a separate MM-only PR.

Close #3882

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.66%. Comparing base (2676968) to head (eb7518d).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3925   +/-   ##
=========================================
  Coverage     10.65%   10.66%           
- Complexity     5528     5534    +6     
=========================================
  Files           836      836           
  Lines        114275   114276    +1     
  Branches      17185    17184    -1     
=========================================
+ Hits          12176    12184    +8     
+ Misses       100871   100862    -9     
- Partials       1228     1230    +2     

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[Sleet01]

With the Force Generator changes this PR looks really big, but everything under data/forcegenerator/ is just replacing 'Aero' with 'AeroSpaceFighter'.