- wrong fix especially now that test encoders work as expected
- touch up `HtmlHelperTest` and `RazorViewTest` since test encoders are now consistent
- remove references to old `Microsoft.Extensions.WebEncoders.Testing` package
This reverts commit a9d5876cd9.
- but leave `FormTagHelperTest` and `ValidationMessageTagHelperTest` cleanup alone
nit: use `string.Empty` in `HtmlHelperLinkGenerationTest`
- #2969
- add `ModelBindingMessages` for configuration and `IBindingMetadataProvider` overrides
- use `interface` to avoid `new` oddities when adding a setter to an `abstract` property
- add `IModelBindingMessages` to `ModelMetadata` for use in rest of the product code
- plumb the various bits through the system
- add integration tests using a custom `IBindingMetadataProvider`s to override messages
nits:
- remove unused resources
- use `AttemptedValue` and not `model` in `SimpleTypeModelBinder`
- use `[ConditionalFact]` or `[ConditionalTheory]` instead
- in some cases test was already conditional
- move other `IsMono` checks into data sets where possible
- not reported as skipped but at least not counted as successful
nit: switch from `[ConditionalTheory]` to `[ConditionalFact]` as appropriate
- slightly more efficient since xUnit won't check for data