Cherry-picks for the godot-cpp 4.1 branch - 4th batch#1261

Merged

akien-mga merged 6 commits intogodotengine:4.1from dsnopek:4.1-cherrypicks-4

Oct 12, 2023

+99-41

Commits on Oct 9, 2023

Replace ERR_FAIL_COND with ERR_FAIL_NULL where applicable

AThousandShips
authored and
dsnopek
committed
Fix allocation size overflow check in CowData

AThousandShips
authored and
dsnopek
committed
Add support to import custom variables from parent SConstruct (redux)

adamscott
authored and
dsnopek
committed
Handle missing instance binding callbacks by finding the closest parent
dsnopek
committed
Fix variant call compiler error

mashumafi
authored and
dsnopek
committed
Added fix for javascript build for godot 4.x

nicholas-maltbie
authored and
dsnopek
committed