[Azure CNS] Replace PowerShell commands with native calls for Mellanox NetAdapter

PowerShell commands for Mellanox network adapters in CNS consume significant resources, so we plan to replace them (at least the ones that can be replaced) with native Windows calls.

The issue identifies PowerShell commands used for Mellanox network adapters in CNS, but names no files, tests, or entry points. Start by locating those commands and their Windows call sites, then identify which native calls can replace them; done means the replaceable commands are removed while adapter behavior is preserved and resource use is reduced.

Written by the indexing model from the issue text.