This allows campaign designers to forcibly place specific squadrons at
bases that they would not normally be assigned to, such as assigning
CV-only squadrons to the shore. The airframe itself must be compatible
with the location type, so A-10s still may not be assigned to carriers.
This change only applies to squadrons that are named explicitly. There's
no need for squadrons defined by type because a squadron will always be
generated to fit the need if no pre-defined squadron is found.
Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1621
76b3ff5f6e