create_view_statement: Reuse validation code
create_view_statement: Reuse validation code

This replace some validation logic with a call to
validation::validate_column_family.

Signed-off-by: Duarte Nunes <a60e8b7496f7715d71354fe4c06dd24017025bf1@scylladb.com>

raphaelsc/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,raphaelsc/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,raphaelsc/scylla,duarten/scylla,scylladb/scylla