[CLI-3431] Zone Selection for Single Zone Private Networking Dedicated Clusters

[cqin-confluent]

Release Notes

Breaking Changes

• PLACEHOLDER

New Features

• Add --zone flag to confluent kafka cluster create to enable zone selection feature for dedicated Kafka cluster type with single zone availability.

Bug Fixes

• PLACEHOLDER

Checklist

• [x] I have successfully built and used a custom CLI binary, without linter issues from this PR.
• [x] I have clearly specified in the What section below whether this PR applies to Confluent Cloud, Confluent Platform, or both.
• [x] I have verified this PR in Confluent Cloud pre-prod or production environment, if applicable.
• [x] I have verified this PR in Confluent Platform on-premises environment, if applicable.
• [x] I have attached manual CLI verification results or screenshots in the Test & Review section below.
• [x] I have added appropriate CLI integration or unit tests for any new or updated commands and functionality.
• [x] I confirm that this PR introduces no breaking changes or backward compatibility issues.
• [x] I have indicated the potential customer impact if something goes wrong in the Blast Radius section below.
• [x] I have put checkmarks below confirming that the feature associated with this PR is enabled in:
  • [ ] Confluent Cloud prod
  • [x] Confluent Cloud stag
  • [ ] Confluent Platform
  • [ ] Check this box if the feature is enabled for certain organizations only

What

Add --zone flag to kafka cluster creation command that enables user to specify a certain zone for single zone dedicated clusters. This is for Confluent Cloud resource.

Blast Radius

None. This is an additive change, so no existing commands should be affected.

References

Feature Request 1-Pager

Product Design 1-Pager

Test & Review

Test and Verification Doc

[confluent-cla-assistant[bot]]

:tada: All Contributor License Agreements have been signed. Ready to merge.
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}

[channingdong]

Please fix the lint failures in the CI pipeline as well.