Dynamo_Toolkit: block copying Autodesk assemblies over to Dynamo folders

#### Description:

Today I again ran into issues caused by the fact that one the Autodesk assemblies got copied over to my Dynamo folder, causing an issue that would not have been spotted during the Beta tests (it broke Python editor by disallowing it to load Autodesk assemblies).

Although this time it was evidently my error, I can see this being a boomerang, hard to spot problem - I thought we could introduce some blacklist on postbuild/installer to disallow Autodesk stuff being copied over to Dynamo under any condition?

What do you think @adecler @FraserGreenroyd @al-fisher?

Start by tracing the postbuild and installer steps that copy assemblies into Dynamo folders, then identify where Autodesk assemblies enter that flow. Define the blacklist behavior and verify that Autodesk assemblies are never copied while required assemblies remain available.

Written by the indexing model from the issue text.