Add Functions isolated extension package

[jviau]

This PR enables netherite usage in Azure functions dotnet isolated.

• Adds a new project and nuget package Microsoft.Azure.Functions.Worker.Extensions.DurableTask.Netherite, which has a single attribute that tells the host to load the Microsoft.Azure.DurableTask.Netherite.AzureFunctions package.
  • Customers will reference this package in their dotnet isolated projects (and not Microsoft.Azure.DurableTask.Netherite.AzureFunctions)
• Adds dirs.proj for release build, updates azure-pipelines-release.yml to use this.

[davidmrdavid]

The change looks good to me, though I noticed the CI is failing due to the env variables not being read. Is that something you're looking into?

[davidmrdavid]

can we add a comment here to update the AssemblyInfo whenever we update this?

[jviau]

This is not the version that is to be kept in sync. It is the version of Microsoft.Azure.DurableTask.Netherite.AzureFunctions. Ultimately, it would be nice to automate this - but that can be left for a separate PR as we would need to extract some common versioning targets between the two projects.

[davidmrdavid]

Ah, my mistake. I misread this (twice, one per PR). Thanks, this makes sense.

[jviau]

I have not looked too much into the CI failure, as I saw what you saw: a config issue, and I did not touch that project. So unsure what is going on. @sebastianburckhardt do you have context?

[sebastianburckhardt]

LGTM. The issue with the CI should resolve on its own once we merge this.