Same issue as previous commit removing CockroachDB. numeric type only
supports infinity on PG 14 and there is no easy way in the current
test structure to skip tests based on server version.
pgtype has a ton of tests that don't work on CockroachDB. And because of
how the tests are structured it is difficult to skip just those tests.
pgtype may have significant changes before v5 is released so delay
updating these tests.