[Network] Private link add Microsoft.Network/privateLinkServices provider

[necusjz]

Resolves: #19908

Description

The required type privateLinkServices is part of the cmd allowed values.
I was able to make it work with PowerShell:
Get-AzPrivateEndpointConnection -Name a845698e-xxxxxx -ResourceGroupName xxxxx-aro-rg -ServiceName xxxx-pls
Approve-AzPrivateEndpointConnection -Name a845698e-xxxxxxxxx -ResourceGroupName xxxxxx -ServiceName xxx-pls

Testing Guide

History Notes

[Component Name 1] BREAKING CHANGE: az command a: Make some customer-facing breaking change
[Component Name 2] az command b: Add some customer-facing feature

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[yonzhan]

Network