roachtest: update pgjdbc blocklists

I made the following updates to the pgjdbc blocklists:
- Removed tests which are now passing due to user-defined schema
  support.
- Removed testUpdateSelectOnly since we now support this syntax as a
  no-op.
- Updated some failure reasons to "unknown" for tests which are still
  failing even though the referenced issue was closed.
- Added many BatchExecuteTest.* tests to the ignore list. These tests
  are flaky due to a combination of #54477 and the fact that the tests
  do not run in a deterministic order.

Fixes #53467
Fixes #53738
Fixes #54106

Release note: None