some replacements and fixes that were referring Sandbox/Editor

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Editor/CMakeLists.txt

@@ -9,6 +9,8 @@ if(NOT PAL_TRAIT_BUILD_HOST_TOOLS)
     return()
 endif()
 
+add_subdirectory(Plugins)
+
 ly_add_target(
     NAME EditorCore SHARED
     NAMESPACE Legacy