ci: Add support for testing libpng on Windows ARM64

This is a cherry-pick of commit 92c853c34e41570504baa48b8a8169e53b188324
from branch 'libpng18'.

Co-authored-by: Cosmin Truta <ctruta@gmail.com>
Signed-off-by: Cosmin Truta <ctruta@gmail.com>
1 file changed