Replace `humantime` crate with `jiff`.

[liurenjie1024]

Is your feature request related to a problem or challenge?

Related #1073, humantime is no longer maintained.

Describe the solution you'd like

Replace with jiff

Willingness to contribute

• I can contribute to this feature independently
• I would be willing to contribute to this feature with guidance from the Iceberg Rust community
• I cannot contribute to this feature at this time

[liurenjie1024]

Seems there is not much we can do here, it introduced by object_store and env_logger, we could only wait for upstream to upgrade.

[Xuanwo]

chronotope/humantime#31

djc saved us again. We can close this now.