Update some more ObjectType switch statements to not have default
This allows the compiler to complain if a case has been missed. In
these instances, the tradeoff of having to list a few unneeded cases
to silence the compiler seems better than the risk of actually missing
one.
Discussion: https://www.postgresql.org/message-id/flat/
fce5c98a-45da-19e7-dad0-
21096bccd66e%40enterprisedb.com