Refactor get_time_stamp_ns (#34536)

* Refactor get_time_stamp_ns

* Add place holder function for pc to make pc build pass

* Add missing header file

* Move all time functions to mono-time.c

* Make sampling_thread_running a global variable

* Pass void* to init, clean_up and get_time function to accormodate different clock ID types for different os, and move back profiler specific function

* Add static keyword for local helper function and fix a typo

* Change to platform-specific typedef approach

* Add missing header file for macOS

* Add missing header file for linux

* Change header file name

* Change header file name one more time

* Fix failures on macOS

* Update src/mono/mono/utils/mono-time.h

Co-Authored-By: Ryan Lucia <ryan@luciaonline.net>
Co-authored-by: Ryan Lucia <ryan@luciaonline.net>

diff --cc src/mono/mono/mini/mini-runtime.c
Simple merge