- Update protobuf to v23.4, to fix the cstdint error on Arch Linux, and
make some related changes:
- Silence additional compiler warnings for the new protobuf
- Update absl to 20230125.3, to support the protobuf update, and make
some related changes:
- Silence additional compiler warnings for the new protobuf
- Replace GOOGLE_CHECK_OK with ABSL_CHECK_OK
- Replace GUARDED_BY with ABSL_GUARDED_BY
- Update other instances of cstdint missing in our own code
- Always pull the latest docker images, to avoid stale results when your
workstation has pulled an older image at the same label
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