Fix flaky SpannerToMySqlCustomTransformationLT.reverseReplication1KTpsWithCustomTransformation (#3135)

Raise timeout from 10 to 12

Author: aasthabharill

v2/spanner-to-sourcedb/src/test/java/com/google/cloud/teleport/v2/templates/SpannerToMySqlCustomTransformationLT.java

@@ -126,7 +126,7 @@ public void reverseReplication1KTpsWithCustomTransformation()
 
     PipelineOperator.Result result =
         pipelineOperator.waitForCondition(
-            createConfig(jobInfo, Duration.ofMinutes(10), Duration.ofSeconds(30)), check);
+            createConfig(jobInfo, Duration.ofMinutes(12), Duration.ofSeconds(30)), check);
 
     // Assert Conditions
     assertThatResult(result).meetsConditions();