[3.x] GDScript: Infer variable types on release

[vnen]

Otherwise this creates an inconsistency between debug and release builds, potentially leading to crashes.

• Fix Game crashes in Release exports, no error in Debug (GDScript Pool*Array with type hinted from Array) #48090
• Edit: Fix Writing bool values to PoolByteArray works in debug but not release exports #48999
• Edit: Fix Inferred ints can take floats in a release build #42124

[akien-mga]

Thanks!