chore: bump CMake max policy to 4.2 (#5944) * chore: bupm CMake to 4.1 Signed-off-by: Henry Schreiner <henryfs@princeton.edu> * ci: use newest version of CMake in a few places Signed-off-by: Henry Schreiner <henryfs@princeton.edu> * chore: bupm CMake to 4.2 Signed-off-by: Henry Schreiner <henryfs@princeton.edu> --------- Signed-off-by: Henry Schreiner <henryfs@princeton.edu>