HuggingFace Dataset Connector: Fix issues in script

[andrejridzik]

We are getting errors for some HuggingFace Datasets in the connector src/connectors/huggingface/huggingface_dataset_connector.py. As a result the datasets are not added to the database.

Some specific identified issues:

• issue in creation of distributions, where content_size_kb is exceeding the integer limit
• issue in creation of distributions, where content_url is exceeding field_length.NORMAL (set to 256)
• duplicate dataset tags/keywords due to omitting special accented characters, e.g. málrómur and malromur