Enable collection of new EventCounters in Kestrel

[shirhatti]

We just added new EventCounters in Kestrel. We should enable collecting them in our perf runs
dotnet/aspnetcore#21649

---

[EventSource(Name = "Microsoft-AspNetCore-Server-Kestrel")]

connections-per-second
total-connections
tls-handshakes-per-second
total-tls-handshakes
current-tls-handshakes
failed-tls-handshakes
current-connections
connection-queue-length
request-queue-length
current-upgraded-requests

[leonids2005]

request-queue-length

why it does not work with HTTP/1? Actually, this information is not clearly stated in the docs :(.