Consider JsonValidationMetadataProviders affect only API Controllers

[brunolins16]

The new SystemTextJsonValidationMetadataProvider and NewtonsoftJsonValidationMetadataProviders were added in #39008, however, since their presence will impact how the DisplayName or ModelState errors messages are generated for both APIs and Views was decided to not add them as default.

However, they fix a very common issue for APIs, not much other scenarios, and we should consider an approach to those new providers only affect API Controllers. With that, they could be added as part of the default ModelProviders without affecting other parts of the application.

Related issue: #39010

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[codelovercc]

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