[FLINK-34268] Add a test to verify if restore test exists for ExecNode

[bvarghese1]

What is the purpose of the change

Add a test to verify if restore test exists for ExecNode. This is as part of the Restore test completeness

Verifying this change

All existing restore tests PRs have been merged. There is a SKIP_LIST for python based exec nodes as well as a couple of them which might get merged in 2 weeks.

## Does this pull request potentially affect one of the following parts:

  - Dependencies (does it add or upgrade a dependency): (no)
  - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
  - The serializers: (no)
  - The runtime per-record code paths (performance sensitive): (no)
  - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
  - The S3 file system connector: (no)

## Documentation

  - Does this pull request introduce a new feature? (no)
  - If yes, how is the feature documented? (not applicable)

[flinkbot]

CI report:

• 7a32baaa7ab2881a39213cd14877c38f952a0eea Azure: SUCCESS

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