'az network private-endpoint-connection list' doesn't return the private endpoint connection for web app slot

### Describe the bug

We have a web app with a staging slot (example ids below).

web app id: /subscriptions/***/resourceGroups/***/providers/Microsoft.Web/sites/mysite
web app slot id: /subscriptions/***/resourceGroups/***/providers/Microsoft.Web/sites/mysite/slots/staging

We have disabled the public network & added these endpoints to AFD using private endpoint. Now we can fetch the private endpoint details by using the 'az network private-endpoint-connection list' command for the actual web app (production slot) but not for the 'staging slot' (a slot named staging).

### Related command

az network private-endpoint-connection list --id $id

### Errors

Even if we provide direct slot id, the command returns the private endpoint for the actual web app instead of the slot. Whereas I can see the private endpoint separately if I go to the network tab for the slot in the portal.

### Issue script & Debug output

From --debug telemetry I can see its actually calling the web app & not the slot even if the id is specified....

```
az network private-endpoint-connection list --id /subscriptions/***/resourceGroups/***/providers/Microsoft.Web/sites/***/slots/staging --debug
```

```
cli.knack.cli: Command arguments: ['network', 'private-endpoint-connection', 'list', '--id', '/subscriptions/***/resourceGroups/***/providers/Microsoft.Web/sites/***/slots/staging', '--debug']
cli.knack.cli: __init__ debug log:

msal.telemetry: Generate or reuse correlation_id: 4f35a6f2-50c9-420c-b813-49ffc10e102f
cli.azure.cli.core.util: Request URL: 'https://management.azure.com/subscriptions/***/resourceGroups/***/providers/Microsoft.Web/sites/***?api-version=2019-08-01'
cli.azure.cli.core.util: Request method: 'GET'
cli.azure.cli.core.util: Request headers:
cli.azure.cli.core.util: 'User-Agent': 'python/3.12.8 (Windows-11-10.0.26100-SP0) AZURECLI/2.72.0'
cli.azure.cli.core.util: 'Accept-Encoding': 'gzip, deflate'
cli.azure.cli.core.util: 'Accept': '*/*'
cli.azure.cli.core.util: 'Connection': 'keep-alive'
cli.azure.cli.core.util: 'x-ms-client-request-id': '92a37603-f4aa-485b-8440-29cca87527c7'
cli.azure.cli.core.util: 'CommandName': 'network private-endpoint-connection list'
cli.azure.cli.core.util: 'ParameterSetName': '--id --debug'
cli.azure.cli.core.util: 'Authorization': 'Bearer eyJ0eXAiOiJKV...'
cli.azure.cli.core.util: Request body:
cli.azure.cli.core.util: None

```

### Expected behavior

The command should return correct private endpoint details for actual web app vs slot

### Environment Summary

azure-cli 2.72.0 *

core 2.72.0 *
telemetry 1.1.0

Extensions:
application-insights 1.2.3
front-door 1.3.0
load 2.1.0

Dependencies:
msal 1.32.3
azure-mgmt-resource 23.1.1

Python location 'C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\sanjayd\.azure'
Extensions directory 'C:\Users\sanjayd\.azure\cliextensions'

Python (Windows) 3.12.8 (tags/v3.12.8:2dc476b, Dec 3 2024, 19:07:15) [MSC v.1942 32 bit (Intel)]

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### Additional context