adjust generic document types

[ArneBinder]

With this PR, we modify the generic document types: rename the annotation layers to reflect the annotation type and also reflect that in the document type names.

IMPORTANT: This also changes the default values for annotation layer related parameters in the taskmodules to work with the changes out of the box, i.e.

• TransformerRETextClassificationTaskModule: relation_annotation becomes binary_relations (formerly relations)
• TransformerSeq2SeqTaskModule:
  • entity_annotation becomes labeled_spans (formerly entities), and
  • relation_annotation becomes binary_relations (formerly relations)
• TransformerSpanClassificationTaskModule: entity_annotation becomes labeled_spans (formerly entities)
• TransformerTokenClassificationTaskModule: entity_annotation becomes labeled_spans (formerly entities)

The generic document types are primarily for dataset auto-conversion. However, because we change the default values for the taskmodules as described above, this is a breaking change.