python: Reformat code with black 22.3.0

setup.py

swh/storage/algos/diff.py

swh/storage/algos/dir_iterators.py

swh/storage/algos/origin.py

swh/storage/algos/snapshot.py

swh/storage/api/server.py

swh/storage/backfill.py

swh/storage/cassandra/common.py

swh/storage/cassandra/converters.py

swh/storage/cassandra/cql.py

swh/storage/cassandra/storage.py

swh/storage/cli.py

swh/storage/exc.py

swh/storage/in_memory.py

swh/storage/interface.py

swh/storage/metrics.py

swh/storage/migrate_extrinsic_metadata.py

swh/storage/postgresql/converters.py

swh/storage/postgresql/db.py

swh/storage/postgresql/storage.py