ANCM (In-proc) can cause IIS worker process to become unhealthy

We've seen various reports of IIS worker processes becoming unresponsive/returning 503s until things are iisreset. Out-of-Process hosting seems to fix many of these issues.

From older bugs like (https://github.com/dotnet/aspnetcore/issues/14719) it seems like background exceptions are maybe expected to cause the worker process to crash?

This issue will track investigating and resolving the root cause:

Potentially related issues:
- https://github.com/dotnet/aspnetcore/issues/42661
- https://github.com/dotnet/aspnetcore/issues/40494
- https://github.com/dotnet/aspnetcore/issues/41770
- https://github.com/dotnet/aspnetcore/issues/44108
- https://github.com/dotnet/aspnetcore/issues/40194
- https://github.com/dotnet/aspnetcore/issues/22507
- https://github.com/dotnet/aspnetcore/issues/17781
- https://github.com/dotnet/aspnetcore/issues/14719