[Key Vault] Pull keyword-only arguments out of kwargs

[mccoyp]

We should update method signatures to use keyword-only argument notation, rather than accepting everything in **kwargs. For example,

azure-sdk-for-python/sdk/keyvault/azure-keyvault-certificates/azure/keyvault/certificates/_client.py

Line 590 in 47133e7

def list_properties_of_certificates(self, **kwargs) -> ItemPaged[CertificateProperties]:

should become

def list_properties_of_certificates(self, *, include_pending: Optional[bool] = None, **kwargs) -> ItemPaged[CertificateProperties]:

since include_pending is a recognized keyword-only argument.