Add all "like", "between", "is" operators as comparison operators
Added "like" based operators as "comparison" operators, including
:meth:`.ColumnOperators.startswith` :meth:`.ColumnOperators.endswith`
:meth:`.ColumnOperators.ilike` :meth:`.ColumnOperators.notilike` among many
others, so that all of these operators can be the basis for an ORM
"primaryjoin" condition.