[opencolorio-tools] Separate feature application to avoid circular dependency

[JackBoosY]

The features of openimageio(opencolorio) and opencolorio(application) are dependent on each other.
According to the discussion, reorganize the build list, and separate opencolorio's feature applications into separate ports.

Build list should be :

1. install opencolorio
2. install openimageio[opencolorio]
3. install opencolorio-tools

Fix build errror when building applications.

Fixes #9851.

[PhoebeHui]

opencolorio's feature 'applications' --> new port opencolorio-tools

Currently dependency list:
openimageio[opencolorio] --> Build-Depends: opencolorio
opencolorio --> Build-Depends: glew[core], freeglut[core], lcms[core], yaml-cpp[core], tinyxml[core]
opencolorio-tools --> Build-Depends: openimageio[opencolorio]