* Moved adapters from Infra -> Core
* Allow Composition to accept a service collection instead of an IRegister
* Composition no longer takes IRegister as constructor arg
all tests passing
* Composition no longer implements IRegister
* Lose _uniques in Composition
* lose Composition OnCreatingFactory actions
* Clean up UmbracoCoreServiceCollectionExtensions & Composition
Less IFactory
* LightInject gone where TFW == netstandard2.0 || TFW == netcoreapp3.1
* Resolve dead code issues
* Rename IFactory methods to match IServiceProvider so they can be trivially swapped later.
* Rename IFactory methods to match IServiceProvider so they can be trivially swapped later (continued)
Thought the counts were low, it's mostly extension method usage
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