BACK-1720: implement HEAD requests for metadata fetcher

Description

Motivation and Context

When fetching the metadata for a token, we would like to use a HEAD instead of a GET request in order to save web traffic

How has this been tested?

new unit tests in test_arweave_adapter.py test_data_adapter.py test_http_adapter.py test_ipfs_adapter.py test_metadata_fetcher.py test_metadata_pipeline.py

Screenshots (if appropriate):

Types of changes

[ ] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

[ ] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.

ourzora / offchain

BACK-1720: implement HEAD requests for metadata fetcher #92