INetworkCostManager.GetCost should declare parameter with enum

The [INetworkCostManager.GetCost](https://learn.microsoft.com/en-us/windows/win32/api/netlistmgr/nf-netlistmgr-inetworkcostmanager-getcost) API should declare its first parameter as [`NLM_CONNECTION_COST`](https://learn.microsoft.com/en-us/windows/win32/api/netlistmgr/ne-netlistmgr-nlm_connection_cost), per the documentation.

Search the metadata sources for INetworkCostManager.GetCost and compare its first parameter with the Windows documentation for NLM_CONNECTION_COST. Done means the generated declaration exposes that parameter as the documented enum and the relevant metadata generation or validation checks pass.

Written by the indexing model from the issue text.