[Lint] report warning if resource type key is not read-only in ResourceCreateOrReplace template

As we offlined discussed this is a real case in [contentsafety ](https://github.com/Azure/azure-rest-api-specs/blob/14d24d17491d8c2bde24532cb8cc2d663c0ffd9f/specification/cognitiveservices/ContentSafety/models.tsp#L134-L147), for Azure template `ResourceCreateOrReplace` it would lift the key properties to method level as path parameters, so there would exist duplications between path paramter and request body property and it's better to add a linter to limit the key property as read-only so that we could guide spec author without duplications.

Start with the ContentSafety models.tsp example linked in the issue and trace how the ResourceCreateOrReplace template handles key properties. Add a linter warning for key properties that are not read-only, and verify that the warning prevents duplicated path and request-body properties.

Written by the indexing model from the issue text.