Switch back to upstream hashring crate

[timvisee]

Tracked in: #4213

jeromefroe/hashring-rs#25 got merged, so we can switch back to the upstream crate.

All Submissions:

• Contributions should target the dev branch. Did you create your branch from dev?
• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. Does your submission pass tests?
2. Have you formatted your code locally using cargo +nightly fmt --all command prior to submission?
3. Have you checked your code using cargo clippy --all --all-features command?

[agourlay]

Great job getting the change upstreamed 👍