Red code legacy renderer (#383)

- Remove some references to gEnv->pRenderer/GetIEditor()->GetRenderer() that is now always null.
- Restore the debug console to existence.
- Stop building the following in preparation for their removal:

Code/CryEngine/Cry3DEngine/*
Code/CryEngine/RenderDll/*
Code/Tools/CryFXC/*
Code/Tools/HLSLCrossCompiler/*
Code/Tools/HLSLCrossCompilerMETAL/*
Code/Tools/RC/*
Code/Tools/ShaderCacheGen/*
Tools/CrySCompileServer/*

Code/Tools/AssetProcessor/CMakeLists.txt

@@ -48,7 +48,6 @@ ly_add_target(
             ${additional_dependencies}
     RUNTIME_DEPENDENCIES
         AZ::AssetBuilder
-        Legacy::RC
 )
 
 # Aggregates all combined AssetBuilders into a single LY_ASSET_BUILDERS #define