This change removes the dependency of TempData on the IHttpContextAccessor
by creating an ITempDataDictionaryFactory abstraction. In general, no one
will replace the factory, it's just indirection.
This allows us to drop our dependency on IHttpContextAccessor, and move it
to the functional tests where we specifically depend on it.
The bulk of code churn here is to update tests that use TempData.
- #3571 and part of #3123
- split `ContentViewComponentResult` in two
- add `HtmlEncoder` to `ViewComponentContext`
- remove use of `WebUtility.HtmlEncode()` and `HtmlDecode()`
nits: remove unused `using`s in files I had open
Abstractions - Core MVC extensibility
Controllers - MVC implementations of .Abstractions and supporting
contracts
Infrastructure - General purpose support APIs. Metadata APIs that don't
fit clearly with a feature or with .Abstraction