Issue #2002102 by Berdir, fago, dixon_: Move TypedData primitive types to interfaces.

core/lib/Drupal/Core/Plugin/Context/Context.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Binary.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Boolean.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Date.php

...Drupal/Core/TypedData/Plugin/DataType/DateTimeIso8601.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Duration.php

...Drupal/Core/TypedData/Plugin/DataType/DurationIso8601.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Email.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Float.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Integer.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/String.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/TimeSpan.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Timestamp.php

core/lib/Drupal/Core/TypedData/Plugin/DataType/Uri.php

core/lib/Drupal/Core/TypedData/Primitive.php

core/lib/Drupal/Core/TypedData/PrimitiveBase.php

core/lib/Drupal/Core/TypedData/PrimitiveInterface.php

core/lib/Drupal/Core/TypedData/Type/BinaryInterface.php

core/lib/Drupal/Core/TypedData/Type/BooleanInterface.php

core/lib/Drupal/Core/TypedData/Type/DateTimeInterface.php