Additional Diagnostics

- [x] We should add an event that emits the Kestrel settings. Specifically the configured KestrelServerOptions settings (https://github.com/dotnet/aspnetcore/pull/34680)
- [ ] We should add an event that emits the IIS settings.
- [ ] We should add an event that emits the HTTP.sys settings.
- [ ] MVC options including what application parts were detected (@pranavkm)

Potential other diagnostics:
- [ ] Kestrel Memory Pool utilization vs. size
- [ ] Counter for total blocks in bytes
- [ ] Counter for checked-out blocks in bytes
- [ ] Event for newly allocated blocks
- [ ] Counter for newly created pool instance (could be event too)
- These together can be used to help us decide how much we should invest in #27394 which is to "Allow server Memory Pool to shrink"
- If we do allow the memory pool to shrink, we could add an event for shrinking. We could use these events to determine how many extra allocations the shrinking caused in a given app.

similar issue in runtime repo: https://github.com/dotnet/runtime/issues/56072