Configure Host OS APIs based on HOST macros (#31774)

Configure Host OS APIs based on HOST macros (#31774)

* Use gcenv.windows.inl on Windows HOSTS

* Make two way pipe implementation depend on host

We have no ability to implement a cross OS pipe.  Allow the
two way pipe implentation depend on the host.

* Use empty debug macro implementation on Windows hosts.

* Make HMODULE type depend on host compiler

* Configure long file path wrappers based on host

* Configure memcpy based on host

* Configure FreeLibrary based on host

* Configure host utility funtion based on host

VirtualAlloc, CPU count, NUMA config make most sense as host
queries.  Configure based on host.

* Configure exceptiion holder based on host

* Prefer #if HOST_WINDOWS for longfilepathwrappers.cpp

* Prefer #if HOST_WINDOWS for src/coreclr/src/inc/holder.h

* Do not include GCToOSInterface::GetPageSize() in DAC

* Remove JIT64_BUILD

* !HOST_UNIX -> HOST_WINDOWS