[fix][client]Fix Duplicate generating RETRY topic.

[gaecfov]

Fixes #20427

Modifications

When subscribing, if the topic is already a retry topic, the corresponding retry topic will no longer have the -RETRY suffix added.

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• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
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• Anything that affects deployment

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[tisonkun]

@poorbarcode Please check if this PR should be covered under #20445 or can go forward alone.

Although, please open a PR against master first and we may or may not pick it to released branch. This PR is against branch-3.0 so I'd close it now.