Use f-strings to generate dataset doc

[vijayphoenix]

Update catalog generation script to not use mako (stack trace harder to debug, no pylint, no syntax highlighting).

[Conchylicultor]

Thank you. Looks good!

[Conchylicultor]

Thank you for the update.

[Conchylicultor]

Thank you. This looks good.

[vijayphoenix]

@Conchylicultor The tests are failing because dataclasses

ImportError while importing test module '/tmpfs/src/github/datasets/tensorflow_datasets/scripts/documentation/document_datasets_test.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tensorflow_datasets/scripts/documentation/document_datasets_test.py:23: in <module>
    from tensorflow_datasets.scripts.documentation import document_datasets
tensorflow_datasets/scripts/documentation/document_datasets.py:31: in <module>
    from tensorflow_datasets.scripts.documentation.dataset_markdown_builder import get_markdown_string
tensorflow_datasets/scripts/documentation/dataset_markdown_builder.py:6: in <module>
    import dataclasses
E   ModuleNotFoundError: No module named 'dataclasses'

I think this is because of the python version used for testing

[Conchylicultor]

@Conchylicultor The tests are failing because dataclasses

ImportError while importing test module '/tmpfs/src/github/datasets/tensorflow_datasets/scripts/documentation/document_datasets_test.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tensorflow_datasets/scripts/documentation/document_datasets_test.py:23: in <module>
    from tensorflow_datasets.scripts.documentation import document_datasets
tensorflow_datasets/scripts/documentation/document_datasets.py:31: in <module>
    from tensorflow_datasets.scripts.documentation.dataset_markdown_builder import get_markdown_string
tensorflow_datasets/scripts/documentation/dataset_markdown_builder.py:6: in <module>
    import dataclasses
E   ModuleNotFoundError: No module named 'dataclasses'

I think this is because of the python version used for testing

We can add dataclasses 3.6 backport to setup.py. Alternatively, implementing my comment #2186 (comment) will remove the need for dataclasses, as Session will be a abc.Abc instead of dataclass

[Conchylicultor]

Awesome! Great work Vijay