feat: improved message on TransactionCanceledException

* Improve handling of TransactionCanceledException by avoid creating new instance of it from scratch

* Fixing build failures, reverting the previous commit because of test failures and unclear resolution. Adopting decoration of the exception to not lose the AWS error message

* Update log

tempest2/src/main/kotlin/app/cash/tempest2/internal/DynamoDbLogicalDb.kt

@@ -346,7 +346,10 @@ internal class DynamoDbLogicalDb(
     // parse the potentially concurrency related TransactionCancelledExceptions
     // https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/dynamodbv2/model/TransactionCanceledException.html
     throw TransactionCanceledException.builder()
-      .message("Write transaction failed: ${writeSet.describeOperations()}")
+      .message(
+        "Write transaction failed: ${writeSet.describeOperations()}.\n" +
+          " Aws error message: ${e.message}"
+      )
       .cancellationReasons(e.cancellationReasons())
       .build()
   }