Improve compiler and dependency caching in CI

1. In windows.yml (build-msvc), cache and configure ccache via
   CMAKE_VS_GLOBALS (CLToolExe=cl.exe, CLToolPath, TrackFileAccess=false,
   UseMultiToolTask=true) so Visual Studio 2026 builds cache translation
   units across runs just like build-mingw.

2. In linux.yml, cache the extracted libcudss archive with
   actions/cache@v4, matching the mold cache and windows.yml.

3. In macos.yml, set HOMEBREW_NO_AUTO_UPDATE=1 and
   HOMEBREW_NO_INSTALL_CLEANUP=1 to avoid redundant Homebrew index
   updates and post-install cleanups on every job.

4. In android.yml, remove ${{matrix.abi}} from the header-only Eigen
   3.4.0 cache key so all four Android ABIs share a single cached
   install.

Change-Id: I3d6f5c03a9e216f4b051e9437a2ca3e66d48b233