Fix encryption status of sequences

ALTER TABLE SET ACCESS METHOD doesn’t recreate sequences, which means their encryption status doesn’t change when a table is converted to/from tde_heap.

We need to add special handling around this:

• handlers around CREATE SEQUENCE / ALTER SEQUENCE to associate a sequences encryption status with the encryption status of the owning table, if there’s an owner

• modify the post event handler code to automatically call ALTER SEQUENCE for all sequences associated with the table, if needed - only if this is possible to implement