cql3: expr: Use column_maybe_subscripted in equal()
cql3: expr: Use column_maybe_subscripted in equal()

equal() used to take column_value which could be subscripted as an argument.
column_value.sub will be removed so this function needs to take column_maybe_subscripted now.

To get lhs value the code uses get_value() which is ready to handle subscripted columns.

Signed-off-by: Jan Ciolek <b66a6f3989e26cb552db14b7ab163c3a50292e24@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla