This patch adds support for the skip realization option of the input descriptor. Inputs that request skip realization will not be realized on the operation domain of the operation and will not contribute to its computation, and consequently, they can't be a domain input. An example is the bokeh input of the Bokeh Blur node, which is actually a resource that is decoupled from the rest of the inputs and should not affect or be affected by their domain. Differential Revision: https://developer.blender.org/D15767 Reviewed By: Clement Foucault