Merge branch 'no-timezone-shift' into rust-compression

.../org/softwareheritage/graph/compress/ORCGraphDataset.java

...example_dataset/compressed/example.property.author_id.bin

..._dataset/compressed/example.property.author_timestamp.bin

...t/compressed/example.property.author_timestamp_offset.bin

...mple_dataset/compressed/example.property.committer_id.bin

...taset/compressed/example.property.committer_timestamp.bin

...ompressed/example.property.committer_timestamp_offset.bin

...ataset/compressed/example.property.content.is_skipped.bin

...le_dataset/compressed/example.property.content.length.bin

...le_dataset/compressed/example.property.message.offset.bin

...e_dataset/compressed/example.property.tag_name.offset.bin

swh/graph/tests/luigi/test_compressgraph.py

swh/graph/webgraph.py