Windows: Add sanitizers for llvm-mingw, increase stack for ASan

[alvinhochun]

ASan and UBSan are supported by llvm-mingw. They can be enabled by passing use_asan=yes use_ubsan=yes to scons.

[bruvzg]

Not sure if README is up-to-date, but seems like sanitizers have some limitations:

• Address Sanitizer doesn't produce working backtraces for i686.
• The sanitizers are only supported on x86.

So we probably should have env["arch"] checks when enabling it.

[alvinhochun]

Backtraces do work for i686, I've used it before. The readme is a bit outdated on this.

The sanitizers are indeed not yet working on arm32/aarch64 according to the maintainer (UBSan might work but it's not enabled for aarch64 in the build) so I suppose I can add a check for it. If they ever gets fixed we can remove the check in the future.

[akien-mga]

Thanks!

[TokageItLab]

Due to this PR, the build command no longer works. Is something wrong with sanitization?

• Issue: Godot core build fails with an error llvm-ar.exe: error: unknown option - when using llvm (llvm-mingw) prior to v14 #96336