Port CoreCLR threading perf improvements

[jkotas]

dotnet/coreclr#9234
dotnet/coreclr#9279
dotnet/coreclr#9471

[jkotas]

cc @stephentoub Since this is not going to be trivial port and you are planning to do more changes there, we may want to do all of them together at the end.

[stephentoub]

we may want to do all of them together at the end

Sounds good

[jkotas]

cc @sergiy-k