Mention the Archived state in pulsar-translation README

[tisonkun]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

This is a subtask of #17972.

Solution

No response

Alternatives

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[tisonkun]

Then archive https://github.com/apache/pulsar-translation repo since now no maintainer is actively working on it.

cc @merlimat @dave2wave I don't know whether it requires a PMC resolution or by lazy consensus and a PMC member can request it in INFAR JIRA project.