- This completely removes the per request allocation until the feature is used.
- In order to make this change viable, we need to introduce a new HttpContextFactory that can accept new services without adding 2^n constructors. As a result, this change introduces a DefaultHttpContextFactory that takes an IServiceProvider and resolves dependencies based on the needs of the DefaultHttpContext and features.
- Throw in the older HttpContextFactory constructor when the IServiceScopeFactory is null
- It also saves us from revving the feature collection version unnecessarily.
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