Tracking thread: in-process model option for .NET 8

[mattchenderson]

This issue thread will track updates relating to the in-process model option for .NET 8. Please see the latest comment for current status.

This issue will be locked so that updates from the team are not lost among other comments. For any questions, feedback, or other issues as the feature becomes available, please open a new issue.

[mattchenderson]

We have posted a new roadmap update which includes information on how the in-process model option for .NET 8 will work: https://aka.ms/azure-functions-dotnet-roadmap/2024-03

[mattchenderson]

Work is ongoing, and we've made good progress. The core artifacts needed are ready, so rollout is the next step. At this point we can now set an ETA: our current goal is to enable support on Windows in June. We have a few more details to figure out for Linux, but custom images should be supported at the same time as Windows.