Is your feature request related to a problem? Please describe.
Try to avoid include "boost" for all builds. This is NOT required for default build. Or please add this as a feature and not in base build.

Needed for: osgPlugins/RestHttpDevice, osgPlugins/COLLADA and ASIO ?

Proposed solution
Remove "boost" and/or add it as a feature.

Describe alternatives you've considered
Remove "boost" at all

Additional context
OSG takes currently a lot of time to build on Github Actions and it need a lot of packages from "boost" in Linux build (a lot of storage as well).