Search Custom Policies

[marvinbuss]

Overview/Summary

Replace this with a brief description of what this Pull Request fixes, changes, etc.

This PR fixes/adds/changes/removes

1. Added Custom Search Policies

As part of this Pull Request I have

• [x] Checked for duplicate Pull Requests
• [x] Associated it with relevant issues, for tracking and closure.
• [x] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [x] Performed testing and provided evidence.
• [ ] Updated relevant and associated documentation.
• [ ] Updated the "What's New?" wiki page (located: /docs/wiki/whats-new.md)

[marvinbuss]

@jtracey93

Azure Cognitive Search

Policy Name	Policy Area	Description
Deny-Search-PublicNetworkAccess	Network Isolation	Denies public network access for Cognitive Search.
Deny-Search-Sku	Busget	Enforces Cognitive Search SKUs.

[marvinbuss]

@krnese I would enforce the following on the Corp Management Group:

Deny-Search-PublicNetworkAccess

[krowlandson]

• Closing as superseded by #1144