feat: add set-replication-clusters command for topics

[codelipenghui]

Summary

This PR adds a new command set-replication-clusters to pulsarctl topics. This command allows users to set the replication clusters for a specific topic.

Changes

• Added pkg/ctl/topic/set_replication_clusters.go to implement the command logic.
• Updated pkg/ctl/topic/topic.go to register the new command.
• Added pkg/ctl/topic/set_replication_clusters_test.go for testing.

Usage

pulsarctl topics set-replication-clusters tenant/namespace/topic --clusters cluster1,cluster2

[github-actions]

@codelipenghui:Thanks for your contribution. For this PR, do we need to update docs?
(The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)