fix(efs): cannot run an integ test when transitionToArchivePolicy is specified and throughputMode is undefined (#33713)

### Issue # (if applicable)

N/A

### Reason for this change
I encountered this problem when fixing a bug. This PR fixes an issue where we cannot rerun [test/aws-efs/test/integ.efs-transition.js](https://github.com/aws/aws-cdk/blob/main/packages/%40aws-cdk-testing/framework-integ/test/aws-efs/test/integ.efs-transition.ts).

When attempting to rerun this test, the following error is encountered:

```sh
The ThroughputMode value for the file system does not support TransitionToArchive. Either change the ThroughputMode value to Elastic or remove the TransitionToArchive parameter.
``` 

When `throughputMode` is `undefined`, throughput mode is set to `Bursting`.
However, `transitionToArchive` is only supported in the Elastic throughput mode. ([Ref](https://docs.aws.amazon.com/efs/latest/ug/API_PutLifecycleConfiguration.html))

> The Archive storage class is available only for file systems that use the Elastic throughput mode and the General Purpose performance mode.

### Description of changes
Set `throughputMode` to `Elastic` when `transitionToArchivePolicy` is specified in a unit test and an integ test.
I also considered adding validations. However, I decided against it as it might cause regression issues.



### Describe any new or updated permissions being added
Nothing




### Description of how you validated changes
Successfully reran the integration test.



### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: mazyu36

packages/@aws-cdk-testing/framework-integ/test/aws-efs/test/integ.efs-transition.js.snapshot/cdk.out

@@ -395,7 +395,8 @@
      {
       "TransitionToArchive": "AFTER_90_DAYS"
      }
-    ]
+    ],
+    "ThroughputMode": "elastic"
    },
    "UpdateReplacePolicy": "Retain",
    "DeletionPolicy": "Retain"