feat(stepfunctions): add parameters to parallel state (#34131)

### Issue # (if applicable)

Closes #32791 .

### Reason for this change

Keep concordence in arguments for cloudformation and cdk for the state parallel: https://docs.aws.amazon.com/step-functions/latest/dg/state-parallel.html

### Description of changes

Add parameters to `ParallelJsonPathOptions` for `ParallelProps`.

### Describe any new or updated permissions being added

None

### Description of how you validated changes

Existing tests.

### 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: HeNeos