Enable arcade -sign functionality across arcade-validation builds #15181
Description
We should turn on signing for all arcade-validation builds since this will validate the signing functionality from arcade. This includes
- Windows: Already enabled
- Linux: Enabled with Enable signing on Linux arcade-validation#4575
- MacOS: Enable Signing on MacOS arcade-validation#4624
- Was blocked on
eng/common/native/install-cmake.shIncompatible with macOS in arcade-validation dnceng#4204, is now unblocked
- Was blocked on