KAFKA-10209: Fix connect_rest_test.py after the introduction of new connector configs (#8944)

There are two new configs introduced by 371f14c3c12d2e341ac96bd52393b43a10acfa84 and 1c4eb1a5757df611735cfac9b709e0d80d0da4b3 so we have to update the expected configs in the connect_rest_test.py system test too.

Reviewer: Konstantine Karantasis <konstantine@confluent.io>

tests/kafkatest/tests/connect/connect_rest_test.py

@@ -34,11 +34,11 @@ class ConnectRestApiTest(KafkaTest):
 
     FILE_SOURCE_CONFIGS = {'name', 'connector.class', 'tasks.max', 'key.converter', 'value.converter', 'header.converter', 'batch.size',
                            'topic', 'file', 'transforms', 'config.action.reload', 'errors.retry.timeout', 'errors.retry.delay.max.ms',
-                           'errors.tolerance', 'errors.log.enable', 'errors.log.include.messages'}
+                           'errors.tolerance', 'errors.log.enable', 'errors.log.include.messages', 'predicates', 'topic.creation.groups'}
     FILE_SINK_CONFIGS = {'name', 'connector.class', 'tasks.max', 'key.converter', 'value.converter', 'header.converter', 'topics',
                          'file', 'transforms', 'topics.regex', 'config.action.reload', 'errors.retry.timeout', 'errors.retry.delay.max.ms',
                          'errors.tolerance', 'errors.log.enable', 'errors.log.include.messages', 'errors.deadletterqueue.topic.name',
-                         'errors.deadletterqueue.topic.replication.factor', 'errors.deadletterqueue.context.headers.enable'}
+                         'errors.deadletterqueue.topic.replication.factor', 'errors.deadletterqueue.context.headers.enable', 'predicates'}
 
     INPUT_FILE = "/mnt/connect.input"
     INPUT_FILE2 = "/mnt/connect.input2"