Draft: Fix Mesa3D build with static CRT in MSYS2 related to regex
Closes: #4665
Fixes: 5a2b9300 ("meson/xmlconfig: win32 regex fallback")
External ref: https://github.com/msys2/MINGW-packages/issues/11916
Testing this requires Meson 0.63 or newer otherwise you have to get your hands dirty with binary wraps to conpensate for '--prefer-static` being unavailable. Test this by adding '--prefer-static -Dc_link_args="-static" -Dcpp_link_args="-static"' to Meson setup command.