Support provisioning MongoDB via CosmosDB on Azure

[davidfowl]

There are multiple ways to support mongo db on Azure

• https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/vcore/
• https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/introduction

Bicep example (I think this is the first one). https://learn.microsoft.com/en-us/azure/cosmos-db/mongodb/manage-with-bicep

[davidfowl]

Moving this to preview 5

[joperezr]

CDK work takes priority over this.