Simplify conditional/contextual injection based on parent collection item

[dotnetjunkie]

Simple Injector users keep struggling with a particular use case that allows them to apply a repeating class over collection of other types.

The following issues show use cases for this:

• how to Create a collection generic adapter #869
• Implementations with both resolvable dependencies and concrete parameters #886
• Is it possible to compose collection items between them ? #902
• https://stackoverflow.com/questions/65911575/chaining-dependency-injection-in-net-core-3-1
• And perhaps https://stackoverflow.com/questions/71588273/conditionally-register-collection-in-simple-injector