PYTHON-4303 Temporarily skip two transaction tests (#1577)

Author: caseyclements

test/unified_format.py

@@ -1049,6 +1049,10 @@ def maybe_skip_test(self, spec):
 
         if "unpin after TransientTransactionError error on" in spec["description"]:
             self.skipTest("Skipping TransientTransactionError pending PYTHON-4227")
+        if "withTransaction commits after callback returns" in spec["description"]:
+            self.skipTest("Skipping TransientTransactionError pending PYTHON-4303")
+        if "unpin on successful abort" in spec["description"]:
+            self.skipTest("Skipping TransientTransactionError pending PYTHON-4227")
 
         if "unpin after non-transient error on abort" in spec["description"]:
             if client_context.version[0] == 8: