Implement icall used by RuntimeHelpers.EnsureSufficientExecutionStack on netcore...

Implement icall used by RuntimeHelpers.EnsureSufficientExecutionStack on netcore Mono. (#33857)

Current implementation always returned true for Windows/Linux/Android.
There are however use of this API in Task library to make sure recursive
tasks won't hit stackoverflow. There are several tests in System.Threading.Tasks
that currently hit this, at least on Windows, causing test failures.

Fix use stack limits already setup in register_thread and used by GC when
doing conservative stack scan. If the limits have not been setup or is not
supported on platform, we will use old defaults, always assume there is
enough stack space available. Heuristics around size of minimum execution
stack needed are picked from corresponding CoreCLR implementation.