[hotfix] [test] Also trap INT signal in Kafka end-to-end test

This allows the test to perform the cleanup procedure (as well as
printing any error logs) if an interruption occurred while waiting for
the test data to be written to Kafka, therefore increasing visibility of
reasons to why the test was stalling.

This closes apache#5568.

test-infra/end-to-end-test/test_streaming_kafka010.sh

@@ -51,6 +51,7 @@ function kafka_cleanup {
  # make sure to run regular cleanup as well
  cleanup
 }
+trap kafka_cleanup INT
 trap kafka_cleanup EXIT
 
 # zookeeper outputs the "Node does not exist" bit to stderr