### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Currently, when passing `$$.Execution.StartTime` as a parameter to a SFN lambda, it is coming in in the format `HH:MM:SS.###`.

### Expected Behavior

`$$.Execution.StartTime` should be an ISO 8601 datetime string.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

This is run in a docker compose file.

Step function definition is

```json
{
  "Comment": "Sample SFN",
  "StartAt": "SampleLambda",
  "States": {    
    "SampleLambda": {
      "Type": "Task",
      "Resource": "arn:aws:states:::lambda:invoke",
      "End": true,
      "Parameters": {
        "FunctionName": "Sample-Function",
        "Payload": {
          "data": {
            "startDateTime.$": "$$.Execution.StartTime"
          }
        }
      }
    }
  }
}
```

### Environment

```markdown
- OS: Mac OS Ventura 13.6.1
- LocalStack:
LocalStack version: 3.0.1.dev
LocalStack build date: 2023-11-20
LocalStack build git hash: 3e32b438
```


### Anything else?

Thank you so much for your hard work.
self,
        context: RequestContext,
        state_machine_arn: Arn,
        revision_id: RevisionId = None,
        description: VersionDescription = None,
    ) -> PublishStateMachineVersionOutput:
        state_machines = self.get_store(context).state_machines
        state_machine_revision = state_machines.get(state_machine_arn)
        if not isinstance(state_machine_revision, StateMachineRevision):
            raise InvalidArn()
        if revision_id is not None and state_machine_revision.revision_id != revision_id:
            raise ConflictException(
                f"Failed to publish the State Machine version for revision {revision_id}. "
                f"The current State Machine revision is {state_machine_revision.revision_id}."
            )
        state_machine_version = state_machine_revision.create_version(description=description)
        if state_machine_version is not None:
            state_machines[state_machine_version.arn] = state_machine_version
        else:
            target_revision_id = revision_id or state_machine_revision.revision_id
            state_machine_version_arn = state_machine_revision.versions.get(target_revision_id)
            state_machine_version = state_machines[state_machine_version_arn]
        return PublishStateMachineVersionOutput(
            creationDate=state_machine_version.create_date,
            stateMachineVersionArn=state_machine_version.arn,
        )
    def tag_resource(