Enable MuJoCo Studio build and packaging on Windows.

Also:
- Patched Filament to support building with Clang, so the default MuJoCo build
  mode doesn't need to change. This should probably be upstreamed.
- Added missing Windows deps to MuJoCo Platform CMake config.
- Updated Studio CMake config to fix unresolved symbols issues on Windows.
PiperOrigin-RevId: 934612701
Change-Id: I3a34a5d274e1452c9cfef0e2868f2788b4b0c7e8

cmake/third_party_deps/filament.cmake

@@ -44,12 +44,18 @@ set(FILAMENT_USE_EXTERNAL_BENCHMARK ON)
 set(FILAMENT_USE_EXTERNAL_GTEST ON)
 if(WIN32)
     set(USE_STATIC_CRT OFF)
+    add_compile_definitions(WIN32)
 endif()
 
+set(FILAMENT_PATCH_COMMAND
+  git apply --reject --whitespace=fix ${mujoco_SOURCE_DIR}/cmake/filament-allow-clang-windows.patch
+)
+
 fetchpackage(
     PACKAGE_NAME  filament
     GIT_REPO      https://github.com/google/filament.git
     GIT_TAG       ${MUJOCO_DEP_VERSION_filament}
+    PATCH_COMMAND ${FILAMENT_PATCH_COMMAND}
 )
 
 set(BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS_OLD})