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/Sandbox/Editor/Platform/Windows/editor_windows.cmake

@@ -8,8 +8,3 @@
 # remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
-
-set(LY_BUILD_DEPENDENCIES
-    PRIVATE
-        Legacy::CryRenderNULL
-)