Add Support for Provisioning Container in Autopilot mode

[PlagueHO]

https://docs.microsoft.com/en-us/azure/cosmos-db/provision-throughput-autopilot

[DanielLarsenNZ]

Can't see an offer type in API docs yet.

https://docs.microsoft.com/en-us/rest/api/cosmos-db/create-a-collection

Do we publish preview API docs?

[PlagueHO]

I'm not sure if we do publish preview API docs. If we can find out, and if the REST API's do support this then we should add the feature.

I'm updating the CI/CD pipeline to adopt a continuous delivery model that will allow us to release Preview modules to the PS Gallery (using @gaelcolas 's Sampler project). This will allow features to get built and released more quickly. See #324

[PlagueHO]

Also, I suspect this REST API will also be affected by Auto-Pilot: https://docs.microsoft.com/en-us/rest/api/cosmos-db/offers

[PlagueHO]

Documentation is now available here: https://docs.microsoft.com/en-us/rest/api/cosmos-db/create-a-collection