Update etcd project maintainers

[ivanvc]

Remove emeritus maintainers, add Wei, and add Siyuan and Ivan to the SIG-etcd maintainers list.

This is a clean up of the etcd maintainers. The changes in the CSV follow the current state of our OWNER and OWNER_ALIASES files. These files reflect the following actions:

• https://github.com/etcd-io/etcd/pull/19572
• https://github.com/etcd-io/etcd/pull/17385
• https://github.com/etcd-io/etcd/pull/17156
• Wenjia/Siyuan transition
  • https://groups.google.com/g/etcd-dev/c/1I9Q8i97Lts
  • https://github.com/kubernetes/community/issues/8478
  • https://github.com/etcd-io/etcd/pull/20203
• https://github.com/kubernetes/org/pull/5491

FYI @siyuanfoundation, @fuweid.

Thanks, @jberkus, for spotting the staleness of the etcd list.

Checklist for maintainer updates

• [x] You've provided a link to documentation where the project has approved the maintainer changes.
• [x] The maintainer(s) also created or updated their LFX Individual Dashboard profile.
• [x] You've sent an email with the list of email address(es) to [email protected] for invitations to Service Desk and mailing lists. You can just mark this complete if you are only removing people.
• [ ] Optional: You've also sent a PR with affiliation updates to cncf/gitdm.