graphics/{,py-}opencolorio{,-tools}: Update 2.3.2 => 2.4.2

Improve port:

• Add textproc/py-docutils to ${BUILD_DEPENDS}
• port{clippy|fmt|lint} maintenance
• Remove Sphinx documentation sources from installation
• Split long lines
• Sort options
• Sort plist

Changelogs:
https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.4.0
https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.4.1
https://github.com/AcademySoftwareFoundation/OpenColorIO/releases/tag/v2.4.2

PR: 286622
Approved by: Shane <FreeBSD@ShaneWare.Biz>
Co-authored-by: vvd