fix(testing-sdk): remove duplicate store update, use invoke

- remove duplicate store update when validating invocation response
- use client.invoke instead of invoke20150331

Author: Alex Wang

src/aws_durable_execution_sdk_python_testing/executor.py

@@ -602,7 +602,6 @@ def _validate_invocation_response_and_store(
                 self._complete_workflow(
                     execution_arn, result=None, error=response.error
                 )
-                self._store.save(execution)
 
             case InvocationStatus.SUCCEEDED:
                 if response.error is not None:
@@ -614,7 +613,6 @@ def _validate_invocation_response_and_store(
                 self._complete_workflow(
                     execution_arn, result=response.result, error=None
                 )
-                self._store.save(execution)
 
             case InvocationStatus.PENDING:
                 if not execution.has_pending_operations(execution):

src/aws_durable_execution_sdk_python_testing/invoker.py

@@ -143,9 +143,8 @@ def invoke(
         function_name: str,
         input: DurableExecutionInvocationInput,
     ) -> DurableExecutionInvocationOutput:
-        # TODO: temporary method name pre-build - switch to `invoke` for final
         # TODO: wrap ResourceNotFoundException from lambda in ResourceNotFoundException from this lib
-        response = self.lambda_client.invoke20150331(
+        response = self.lambda_client.invoke(
             FunctionName=function_name,
             InvocationType="RequestResponse",  # Synchronous invocation
             Payload=json.dumps(input.to_dict(), default=str),