KAFKA-10611: Merge log error to avoid double error (#9407)

When using an error tracking system, two error log messages result into two different alerts.
It's best to group the logs and have one error with all the information.

For example when using with Sentry, this double line of log.error will create 2 different Issues. One can merge the issues but it will be simpler to have a single error log line.

Signed-off-by: Benoit Maggi <benoit.maggi@gmail.com>

Reviewers: Ewen Cheslack-Postava <me@ewencp.org>, Konstantine Karantasis <k.karantasis@gmail.com>

connect/runtime/src/main/java/org/apache/kafka/connect/runtime/WorkerTask.java

@@ -184,8 +184,7 @@ abstract class WorkerTask implements Runnable {
 
             execute();
         } catch (Throwable t) {
-            log.error("{} Task threw an uncaught and unrecoverable exception", this, t);
-            log.error("{} Task is being killed and will not recover until manually restarted", this);
+            log.error("{} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted", this, t);
             throw t;
         } finally {
             doClose();
@@ -456,4 +455,4 @@ abstract class WorkerTask implements Runnable {
             return metricGroup;
         }
     }
-}
+}