Simplified use of keyword arguments in filters.py

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What has been done:

• Using **kwargs for keyword arguments in filters.py so that we don't have to include the arguments of get_hf_filter in every other get_filter* method

Checklist

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• Versioning and website
  • Changelog is up to date
  • The patch number in parameters.F90 is correct
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• Testing
  • Tested with -rcheck
  • Tested with -fbatch
• Compliance with style guide
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