Refactor MyrestHelper and REST resources to use proper Dependency Injection....

Sergey Drakrequested to merge
issue/myrest-3582662:3582662-refactor-myresthelper-to into 1.0.x

Refactor MyrestHelper and REST resources to use proper Dependency Injection. Replaced static Entity::load() calls with injected entity storage in MyrestHelper. Injected DateFormatterInterface into MyrestResourceBase. Cleaned REST resources from \Drupal:: service calls. Updated OpenAPI generators and Normalizer with proper service injection.

Closes #3582662

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