feat(run-integration-test/kustomize): Recombine multi-line exception logs

[NickLarsenNZ]

This should join multi-line exception logs, like below into a single log event.

java.net.UnknownHostException: test-zk-server-primary-1.test-zk-server-primary-headless.kuttl-test-adjusted-oryx.svc.cluster.local
    at java.base/sun.nio.ch.NioSocketImpl.connect(Unknown Source)
    at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
    at java.base/sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.initiateConnection(QuorumCnxManager.java:381)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager$QuorumConnectionReqThread.run(QuorumCnxManager.java:455)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.base/java.lang.Thread.run(Unknown Source)