Improve pricing awareness

[gkulin]

We want to make it clear to users that deploying a template is not free. The cost varies, so at this time providing a specific price is not in scope but we do have a couple small changes that would make a big difference in discovering price earlier:

• [ ] Before deploying (either during init or while prompting for subscription, location, etc. during up), provide a message explaining that deploying the template will cost money and then linking to the Azure pricing calculator.
  • [ ] Explore providing a link to the calculator pre-populated according to the specs of the template (example)
• [ ] After deploy write a message and provide a link to the cost analysis within the Azure Portal (similar to how today we include a link to the resource group overview)