roachtest: remove TimeTest.getTimeZone from pgjdbc blocklist

The pgjdbc roachtest has been failing because
`org.postgresql.test.jdbc2.TimeTest.getTimeZone()` now passes
consistently but is still on the blocklist, causing an "unexpected
pass" failure. The test has passed across 10+ runs spanning multiple
days, architectures (amd64/arm64), clouds (Azure/GCE), and with/without
runtime assertions.

The test likely started passing after the overload resolution fix in
228595c that improved type checking for scalar expressions involving
casts, which is what `getTimeZone()` exercises.

Resolves: #169524
Epic: none

Release note: None

Generated by Claude Code Auto-Solver
Co-Authored-By: Claude <noreply@anthropic.com>

Author: cockroach-teamcity

pkg/cmd/roachtest/tests/pgjdbc_blocklist.go

@@ -377,7 +377,6 @@ var pgjdbcBlockList = blocklist{
 	`org.postgresql.test.jdbc2.StatementTest.parsingSemiColons()`:                                                                                                   "unknown",
 	`org.postgresql.test.jdbc2.StatementTest.updateCount()`:                                                                                                         "unknown",
 	`org.postgresql.test.jdbc2.StatementTest.warningsAreAvailableAsap()`:                                                                                            "unknown",
-	`org.postgresql.test.jdbc2.TimeTest.getTimeZone()`:                                                                                                              "unknown",
 	`org.postgresql.test.jdbc2.UpdateableResultTest.testArray`:                                                                                                      "26925",
 	`org.postgresql.test.jdbc2.UpdateableResultTest.testOidUpdatable`:                                                                                               "unknown",
 	`org.postgresql.test.jdbc3.CompositeTest.complexArgumentSelect()`:                                                                                               "51480",