Some dependencies not installed on macOS CIs

[mvieth]

          Openni fails to install on both versions. Should we remove it, figure if we need to update it or just ignore it and see if it fixes itself at some point 😆?

Originally posted by @larshg in https://github.com/PointCloudLibrary/pcl/issues/6147#issuecomment-2390482824

OpenNI and OpenNI2 are currently not installed on the macOS CIs. Options I see:

• fix installation with homebrew. Would likely involve porting the recipes to homebrew-core?
• install via macports? Not sure if mixing packages from two package managers is a good idea
• install from source?

Related: https://github.com/PointCloudLibrary/pcl/pull/4579