[Mgmt][multiapi] can't call configured api_version after multiapi_combiner

[msyyc]

During migration to lightweight compute package, CLI team finds that they can't call api-version configured. The root cause is that: https://github.com/Azure/azure-sdk-for-python/blob/c2d57bd53ac8ba6a3e0e04f1bf0967e40211f30a/sdk/compute/azure-mgmt-compute/azure/mgmt/compute/operations/_operations.py#L4275
we shall change

api_version: str = kwargs.pop("api_version", _params.pop("api-version", "2022-11-01"))

to:

api_version: str = kwargs.pop("api_version", _params.pop("api-version", self._api_version))

[msyyc]

CLI import client from subfoder (like v2020_01_01) of old multiapi package, to unbreak CLI, we shall change to:

api_version: str = kwargs.pop("api_version", _params.pop("api-version", getattr(self, "_api_version", None) or "2022-11-01"))