Re-introduce the ability to ignore disposing scoped and singleton components

[dotnetjunkie]

This feature is related to #683, but implements the change in the core library.

The Simple Injector integration packages allows cross wiring of services provided by the ASP.NET Core configuration system. In doing so, however, it partly takes control and ensures disposal. The Core configuration system, unfortunately, disposes those components as well, causing a dependency to be disposed twice.

Due to the contract of IDisposable, this shouldn't be a problem. Classes must allow Dispose to be called multiple times without causing problems.

Developers, however, don't always work according to this pattern, and this might cause performance issues when Dispose is called multiple times.

Since Simple Injector can not take ownership of those components, it should let Core dispose of these instances (as there is no way to instruct Core to not dispose of those instances anyway) and prevent disposing them.

This does mean, however, introducing a change to the Simple Injector core library as it does allow disabling the disposal of Scoped or Singleton components (this is a feature that had been removed with the introduction of v3.0).

[dotnetjunkie]

feature-706 branch created.