grpc_servicer should use *args to pass positional parameters

[bkeryan]

Tech Debt

The MeasurementService.configuration_parameter decorator describes positional parameters in order, but grpc_servicer uses inspect.signature to look up the parameter names so that it can use **kwargs to pass them:

https://github.com/ni/measurementlink-python/blob/main/ni_measurementlink_service/_internal/grpc_servicer.py#L98
https://github.com/ni/measurementlink-python/blob/main/ni_measurementlink_service/_internal/grpc_servicer.py#L245

Passing positional parameters with *args would be simpler and have slightly lower overhead.

AB#2457623