Added call to setup function of serializer class to set data format

[vgurev]

Fixed bug. No calls were made to the setup function of serializer class. Reading failed for serializers that required setup, for instance, serializers for no_header_numpy fails

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

We wrote a code that writes dataset with numpy arrays. Litdata StreamingDataset fails to read the data. It seems that numpy arrays were serialized as no_header_numpy that requires call to setup function to set data format in serializer class. However, that call is not anywhere in the current code.

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[codecov]

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Additional details and impacted files

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[tchaton]

Thanks for your contribution