Support webapp deploy --async false for src-uri deployments

[danpetitt]

Related command
az webapp deploy --name 'app' --resource-group 'a[[-rg' --slot staging --async false --clean true --restart true --type zip --src-uri 'https://test.blob.core.windows.net/deployments/app-v1.0.0.zip'

Is your feature request related to a problem? Please describe.
Support sync request so the command waits until it has been fully deployed. Otherwise we cannot easily use terraform to deploy the app

Describe the solution you'd like
Fully support the --async false argument for --src-uri style of deployment

Additional context
There isnt even a command you can call repeatedly to see if the app has deployed; its really a complete unknown as to whether the command has worked, completed, failed or is inprogress and as such is not very useful

[yonzhan]

Thank you for opening this issue, we will look into it.

[btardif]

@tulikac we should come back to this after the deployment status is integrated.

[btardif]

@tulikac can we come back to this one

[danpetitt]

Yes please do 😊