[improve][broker]improve the efficiency of creating topic

[HQebupt]

Motivation

The topic creating rate is less than 200 QPS when the topic count of the namespace is about 200,000. It is due to the time cost of topic exist checking. All the topics would be checked one by one in org.apache.pulsar.broker.admin.AdminResource#checkTopicExistsAsync. As the count of topic grows in a namespace, this method will take a lot.

Modifications

use org.apache.pulsar.broker.namespace.NamespaceService#checkTopicExists to check if the topic is exist because this method is more efficient.

Verifying this change

• [x] Make sure that the change passes the CI checks.

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (no)
• The public API: (no)
• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (no)

Documentation

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Need to update docs?

• [x] doc-not-needed

[codelipenghui]

Here is a related ML discussion https://lists.apache.org/thread/2b3bn6f2sw7m6x0pwx1dkk42q8pp3p8n

[github-actions[bot]]

The pr had no activity for 30 days, mark with Stale label.

[tisonkun]

Closed as stale. Feel free to rebase and resubmit the patch.