Munition autoconfig tweaks

[Sleet01]

Thanks to some early QA work, a number of errors in the "final" munition autoconfig code have been identified.
This patch will:

1. Fix Artemis munitions being selected for non-Artemis launchers;
2. Update legality check on ammo types to always use year restrictions with the option to use variable era tech levels;
3. Add tracking of enemy TSM units for consideration when weighting heat-producing munitions;
4. Split "missing munitionLoadoutSettings.xml" error into user warning and debug message with full exception;
5. Adjust "energy boat" unit accounting to only care about those that track heat;
6. Updated some isAvailable() methods to allow Clans access to IS equipment at the same availability from the Clan Invasion era onward, per IO pg 33.
7. Fix errors in getPrototypeDate and getProductionDate that would return no date for munitions missing the Common and/or Production entry (e.g. Air-Defence Arrow Missiles), causing some tech to be unavailable to certain combinations of faction and clan/mixed tech bases.
8. Updated unit tests

Testing:

• Ran all 3 projects' unit tests
• Tested with a number of factions, Clan/IS/Mixed tech levels, and eras, alternating Variable Tech off and on.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.09%. Comparing base (638894f) to head (9523421).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5738   +/-   ##
=========================================
  Coverage     29.09%   29.09%           
- Complexity    13879    13900   +21     
=========================================
  Files          2506     2506           
  Lines        265961   265979   +18     
  Branches      47559    47565    +6     
=========================================
+ Hits          77377    77395   +18     
+ Misses       184684   184669   -15     
- Partials       3900     3915   +15     

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[IllianiCBT]

I took a read through and everything looks good to me :)