Make it possible to give HARMS to other players and fix them being de…

…stroyed when shared via full share (#6343)

Remove the 'INSIGNIFICANTUNIT' category from XRB2309_unit.bp.
- This makes it possible to give HARMS to other players.
- This keeps them from getting destroyed when their original owner dies
in a full share game.

Unfortunately, this makes two HARMS show up in the unit databases. One
is the original HARMS (XRB2308), the other one (XRB2309) is used to make
the HARMS targetable while it is under construction (#2472).

changelog/snippets/fix.6343.md

@@ -0,0 +1 @@
+- (#6343) Remove the `INSIGNIFICANTUNIT` category from the HARMS, to enable them to be transferred to other players again. This also fixes the bug which caused HARMS to get destroyed when their original owner died in a full share game. Additionally, removing the category also allows HARMS to benefit from veterancy again. They will now gain increased hit points and regen from veterancy, just like other units.

units/XRB2309/XRB2309_unit.bp

@@ -14,7 +14,6 @@ UnitBlueprint{
         "CYBRAN",
         "DEFENSE",
         "DRAGBUILD",
-        "INSIGNIFICANTUNIT",
         "OVERLAYANTINAVY",
         "OVERLAYSONAR",
         "PRODUCTFA",