…9447)

### Issue # (if applicable)

Closes #29420 

### Reason for this change

The `cdk list` functionality displays the stacks .

For instance
```
> cdk ls
producer
consumer
```
With the latest changes for list stack dependencies we did add a new flag `-d` to show the dependencies.

The dependencies between stacks can be established in 2 ways:
1. Using the resource defined from one stack in another.
2. Using `addDependency()` to add dependency among stacks.

Current we are fetching the dependency details through the `CloudStackArtifact`.

* Establishing the dependency between stacks through the first method would have the same `displayName` and `id` for the stacks.
Using the `-d` flag to display dependencies -

```
❯ cdk list --show-dependencies
- id: producer
  dependencies: []
- id: consumer
  dependencies:
    - id: producer
      dependencies: []
```
* Establishing the dependency through `addDependency()` will create a different `displayName` and `id`.
In such a case when a user runs `cdk ls` we would want to show the `displayName` and if not present then use the `id`

For instance:
```
> cdk ls
producer
producer/consumer
```
With the `-d` flag we would want to display something like:
```
> cdk ls -d
- id: producer
  dependencies: []
- id: producer/consumer
  dependencies:
    - id: producer
      dependencies: []
```
With our previous change we didn't consider `displayName` and just fetched `id`s which changes the previous functionality and caused a regression.

### Description of changes

With the new changes we are looking out for `displayName` first and if it does not exist we fetch the `id`.

### Description of how you validated changes

Added a new unit test and updated integ 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*