[ORL-74] Add support for Stencil options in Standard shader

[orels1]

There is currently no way to set up Stencil settings using ORL Standard shader in any way

A new Template Feature should be added to support that

Any custom shader PBR-Based shader that wants to adjust stencils should define the Stencil shader feature like so

%ShaderName("My Stencil Shader")
%TemplateFeatures("Stencil")

_{From SyncLinear.com | ORL-74}

[orels1]

This is implemented in 6.4.0 release