full change in implementing windows malloc support

[mar-yan24]

Summary -

Fixes #2337: Windows memory allocation failure when creating many MjData instances.

Not sure if there is much interest in still resolving this issue by @okmatija or @yuvaltassa but I did a simple edit on the original MRE to print the memory allocation and discovered that the origin of the issue. In engine_io.c three mju_malloc calls are made for each MjData using aligned malloc so its overloading the VMS.

Before:

After:

Fix

For allocations >= 64KB on windows, I just replaced _aligned_malloc with VirtualAlloc(MEM_RESERVE) and a vectored exception handler that commits pages on first access. This basically just mimics the linux overcommit behavior.

I am pretty confident that this implementation is safe but a review or some help with the code implementation if needed would be nice.

[mar-yan24]

the more i work on this solution the more im confused on whether or not it is optimal, just implemented a quick fix to pass one of the test cases. any suggestions would be great