Prevent a user from creating a secondary index on a collection column if
the cluster has any nodes which don't support this feature. Such nodes
will not be able to correctly handle requests related to this index,
so better not allow creating one.
Attempting to create an index on a collection before the entire cluster
supports this feature will result in the error:
Indexing of collection columns not supported by some older nodes
in this cluster. Please upgrade them.
Tested by manually disabling this feature in feature_service.cc and
seeing this error message during collection indexing test.
Signed-off-by: Nadav Har'El <nyh@scylladb.com>