azurerm_express_route_port_authorization: add a lock when create/update/delete authorization of express route port

[wuxu92]

The API permits only one create/update/delete operation on the same express route port resource. Or the API will reponse error as below. this was found in the failure of AccTest TestAccExpressRoutePortAuthorization_multiple

Error: deleting Express Route Port Authorization: (Authorization Name "acctestauth1230529023842741531" / Express Route Port Name "acctestERP-230529023842741531" / Resource Group "acctestRG-230529023842741531"): 
network.ExpressRoutePortAuthorizationsClient#Delete: Failure sending request: StatusCode=0 -- 
Original Error: autorest/azure: Service returned an error. Status=<nil> Code="AnotherOperationInProgress" Message="Another operation on this or dependent resource is in progress. To retrieve status of the operation use uri: 
https://management.azure.com/subscriptions/*******/providers/Microsoft.Network/locations/eastus2/operations/2c22b9e6-04c1-4b53-b5b3-4f6513d2ccd6?api-version=2022-07-01." Details=[]

AccTest Result:

=== RUN   TestAccExpressRoutePortAuthorization_multiple
--- PASS: TestAccExpressRoutePortAuthorization_multiple (262.05s)
PASS

[mbfrahry]

Should we also lock azurerm_express_route_port during Create/Update/Delete?

[wuxu92]

@mbfrahry azurerm_express_route_port does not need a lock when tested in my local machine.

[mbfrahry]

Right, but we could get into a scenario where we run into issues because we didn't lock the parent resource. It's rare to cause issues but whenever we lock a parent resource in a child resource, we should also lock the parent resource.

[mbfrahry]

LGTM!

[mbfrahry]

Thanks for adding that lock @wuxu92

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