warpsql: Pass CITUS_VERSION arg from Makefile-s

[jayanth-kumar-morem]

@CurrentBehaviour
The CITUS_VERSION is hardcoded in Dockerfiles.

@ExpectedBehaviour
The CITUS_VERSION should be passed as an argument from Makefiles-s to Dockerfile-s.

Why the change is needed ?
In future, we would like to test various versions of extension being compatible with various psql versions through CI.

CC: @ChakshuGautam