Add Private Link to Key Vault

[mattgotteiner]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Expected/desired behavior

Forward AZURE_PUBLIC_NETWORK_ACCESS and AZURE_USE_PRIVATE_ENDPOINT to key vault
https://learn.microsoft.com/en-us/azure/key-vault/general/private-link-service?tabs=portal

---

Thanks! We'll be in touch soon.

[pamelafox]

Is this still relevant? We aren't currently using KeyVault. Perhaps this is to store the Entra Registration related secrets?