Add networking components

[lucashuet93]

If necessary, this should be completed after the infrastructure is complete. The project initially had a VNet, private endpoints, etc. but were removed for simplicity sake while onboarding new developers.

• virtual network with private endpoint subnet, apim subnet, and aks (api) subnet
• apim deployed in internal mode with public ip
• key vault resource should have private endpoint, disallow traffic
• azure monitor should have private link scope, app insights and log analytics should disallow query/ingestion

[ross-p-smith]

I think we are dropping this as we know it does not add value to the "Accelerator" - can you conform @lucashuet93