(aws-stepfunctions-tasks): Not possible to apply Aspects to Step Function tasks

### Describe the bug

It is not possible to apply changes via `Aspects` on a Step Function `Task`.

### Expected Behavior

Should be possible to apply changes to tasks.

### Current Behavior

Any changes are ignored.

### Reproduction Steps

1. Make a state machine
2. Add a task to the definition
3. Apply aspects and add a retry, for example

### Possible Solution

Lazy evaluate?

### Additional Information/Context

This is happening because state machine definition is rendered to JSON inside the `StateMachine` constructor, thereby not giving a chance to Aspects to apply the changes.

https://github.com/aws/aws-cdk/blob/f178c98d4473d8bb8d46d80c076fa520d03c623b/packages/%40aws-cdk/aws-stepfunctions/lib/state-machine.ts#L410-L417

### CDK CLI Version

2.59.0 (build b24095d)

### Framework Version

2

### Node.js Version

v16.16.0

### OS

macOS

### Language

Typescript

### Language Version

_No response_

### Other information

_No response_

Start with packages/@aws-cdk/aws-stepfunctions/lib/state-machine.ts around lines 410-417, where the issue says the definition is rendered in the StateMachine constructor. Reproduce the reported state machine, task, and Aspect that adds a retry, then trace when the definition is rendered. Done means Aspect changes to Step Function tasks are applied rather than ignored.

Written by the indexing model from the issue text.