Add NASAMs to MERAD unit list for campaign template (#3406) (#3410)

Adds NASAM launcher B and C to the list of units that can be placed in a
campaign template to define a MERAD spawn location.

This is needed to maintain compatibility with the new versions of my
campaigns.

Pull requests should be made against the `develop` branch. Any backports
necessary will be handled by the development team.

Pull requests should be focused on one task. Multiple bug fixes should
be
multiple PRs. We cannot merge half a PR, and combined PRs are much more
difficult to review. PRs that do not adhere to this will have their
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Prefer rebase to merge, and squash commits as needed to preserve a
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Co-authored-by: Starfire13 <[email protected]>

game/campaignloader/mizcampaignloader.py

@@ -61,6 +61,8 @@ class MizCampaignLoader:
         AirDefence.Hawk_ln.id,
         AirDefence.S_75M_Volhov.id,
         AirDefence.X_5p73_s_125_ln.id,
+        AirDefence.NASAMS_LN_B.id,
+        AirDefence.NASAMS_LN_C.id,
     }
 
     SHORT_RANGE_SAM_UNIT_TYPES = {