Remove trailing blank lines from validator and test files

Agent-Logs-Url: https://github.com/Azure/kafka-sink-azure-kusto/sessions/190022b2-658f-4b36-b1fe-b30fad080019

Co-authored-by: tanmaya-panda1 <108695755+tanmaya-panda1@users.noreply.github.com>

Author: Copilot

src/main/java/com/microsoft/azure/kusto/kafka/connect/sink/KustoEndpointUrlValidator.java

@@ -194,4 +194,3 @@ static boolean isIpAddress(String host) {
         return true;
     }
 }
-

src/test/java/com/microsoft/azure/kusto/kafka/connect/sink/KustoEndpointUrlValidatorTest.java

@@ -330,4 +330,4 @@ public void shouldValidateUrlInConnectionStringBuilderWhenEnabled() {
         assertThrows(ConfigException.class, () ->
                 KustoSinkTask.createKustoEngineConnectionString(config, "https://evil.attacker.com"));
     }
-}
+}