integ-runner: integ-runner implictly depends on ts-node

### Describe the bug

Hi, I found a tiny minor issue regarding integ-runner. It'd be great if you check it when you get a chance.

Starting from 2.60.0 (#22058), it seems @aws-cdk/integ-runner implicitly depends on ts-node.

https://github.com/aws/aws-cdk/blob/aca8a256dcaf89b53f7af4f308b2f23e2e766902/packages/%40aws-cdk/integ-runner/lib/runner/integration-tests.ts#L251

Without ts-node, the error below happens:

```
$ yarn integ-runner --update-on-failed
yarn run v1.22.17
Verifying integration test snapshots...

node:internal/modules/cjs/loader:988
throw err;
^

Error: Cannot find module 'ts-node/register'
Require stack:
- internal/preload
at Function.Module._resolveFilename (node:internal/modules/cjs/loader:985:15)
at Function.Module._load (node:internal/modules/cjs/loader:833:27)
at Module.require (node:internal/modules/cjs/loader:1057:19)
at Module._preloadModules (node:internal/modules/cjs/loader:1332:12)
at loadPreloadModules (node:internal/bootstrap/pre_execution:583:5)
at prepareMainThreadExecution (node:internal/bootstrap/pre_execution:95:3)
at node:internal/main/run_main_module:9:1 {
code: 'MODULE_NOT_FOUND',
requireStack: [ 'internal/preload' ]
}
ERROR integ.nodejs-build 0.088s
Command exited with status 1
```

As for usual CDK apps, ts-node is installed by default so it shouldn't be a big problem. In CDK construct library templates generated by projen, however, ts-node is not installed by default so this library behaves somewhat confusing.
Isn't it be more clear if it is explicitly specified in package.json of integ-runner as peerDependency or Dependency?

### Expected Behavior

When installing @aws-cdk/integ-runner, ts-node is installed automatically or at least suggested as a peer dependency.

It will help us a lot if there is more clear way to know the requirements of ts-node, or it is installed automatically.

### Current Behavior

We get an error without ts-node. Also we need to carefully inspect the error and manually install ts-node.

### Reproduction Steps

Use integ-runner for `*integ.ts` files without installing ts-node.

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

2.60.0

### Framework Version

2.60.0

### Node.js Version

v16.18.1

### OS

macOS

### Language

Typescript

### Language Version

_No response_

### Other information

_No response_

Start at packages/@aws-cdk/integ-runner/lib/runner/integration-tests.ts around line 251 and inspect the @aws-cdk/integ-runner package metadata for how ts-node is expected to be provided. Reproduce with an integ.ts file and no ts-node installed, then verify that installation either supplies the dependency automatically or clearly communicates the requirement.

Written by the indexing model from the issue text.