[BUG] /Microsoft.ManagedIdentity/userAssignedIdentities/listAssociatedResources is not defined in the latest API version

### API Spec link

https://github.com/Azure/azure-rest-api-specs/blob/62f4b6969f4273d444daec4a1d2bf9769820fca2/specification/msi/resource-manager/Microsoft.ManagedIdentity/ManagedIdentity/preview/2025-01-31-preview/ManagedIdentity.json

### API Spec version

2025-01-31

### Describe the bug

The `/Microsoft.ManagedIdentity/userAssignedIdentities/{resourceName}/listAssociatedResources` operation is available in [2022-01-31](https://github.com/Azure/azure-rest-api-specs/blob/62f4b6969f4273d444daec4a1d2bf9769820fca2/specification/msi/resource-manager/Microsoft.ManagedIdentity/ManagedIdentity/preview/2022-01-31-preview/ManagedIdentity.json) version of `Microsoft.ManagedIdentity` provider, but not in the latest [2025-01-31](https://github.com/Azure/azure-rest-api-specs/blob/62f4b6969f4273d444daec4a1d2bf9769820fca2/specification/msi/resource-manager/Microsoft.ManagedIdentity/ManagedIdentity/preview/2025-01-31-preview/ManagedIdentity.json) version. This can be considered a bug as this operation is not deprecated, but currently used by [az identity list-resources](https://learn.microsoft.com/en-us/cli/azure/identity?view=azure-cli-latest#az-identity-list-resources) command.

### Expected behavior

The `/Microsoft.ManagedIdentity/userAssignedIdentities/{resourceName}/listAssociatedResources` operation should be included in the [2025-01-31](https://github.com/Azure/azure-rest-api-specs/blob/62f4b6969f4273d444daec4a1d2bf9769820fca2/specification/msi/resource-manager/Microsoft.ManagedIdentity/ManagedIdentity/preview/2025-01-31-preview/ManagedIdentity.json) version. as this operation is not deprecated, but currently used by [az identity list-resources](https://learn.microsoft.com/en-us/cli/azure/identity?view=azure-cli-latest#az-identity-list-resources) command.

### Actual behavior

As explained above, the `/Microsoft.ManagedIdentity/userAssignedIdentities/{resourceName}/listAssociatedResources` operation is not included in the [2025-01-31](https://github.com/Azure/azure-rest-api-specs/blob/62f4b6969f4273d444daec4a1d2bf9769820fca2/specification/msi/resource-manager/Microsoft.ManagedIdentity/ManagedIdentity/preview/2025-01-31-preview/ManagedIdentity.json) version.

### Reproduction Steps

Any emulator based on the latest version of the OpenAPI schema for the `Microsoft.ManagedIdentity` does not include this operation.

### Environment

Any environment.

Compare the 2022-01-31-preview and 2025-01-31-preview ManagedIdentity.json files at the paths linked in the issue, focusing on the userAssignedIdentities listAssociatedResources operation. Confirm the operation is absent from the latest schema and determine the matching definition to restore. Done means the latest API schema includes this non-deprecated operation.

Written by the indexing model from the issue text.