Component dependency resolution on self-contained apps

[vitek-karas]

This issue is meant to track all the work necessary to make component dependency resolution work well on self-contained apps. That is a component is dynamically loaded into a host which is a self-contained app. This relates specifically to the usage of AssemblyDependencyResolver, so app which provide their own dependency resolution mechanism for components are not affected.

On the other hand all these scenarios are affected:

• Managed plugins using AssemblyDependencyResolver (which is our recommendation)
• Managed COM servers
• Managed components loaded through native hosting APIs

Framework assembly overrides - #3641

• SDK change to include information about framework assemblies in self-contained apps - Add ability to differentiate framework assemblies in self-contained apps sdk#3339
• Implementation relying on the new SDK functionality in hostpolicy
• Validation

RID specific asset resolution - #3659

• SDK change to include RID fallback graph in self-contained apps - Self-contained apps should include RID fallback graph in .deps.json sdk#3361
• Tests in core-setup (the functionality should automatically light up with the SDK change)
• Validation