DGS-21546 Follow up PR to handle old CP versions

[rayokota]

What

Recently the DEK creation API was augmented to specify the subject in the URL. For new clients talking to old servers such as CP 8.0.0 that do not have this change, an error will result. This PR addresses the error by retrying the request with the old URL without the subject in the URL.

Checklist

Please answer the questions with Y, N or N/A if not applicable.

• [N] Contains customer facing changes? Including API/behavior changes
• [N] Is this change gated behind config(s)?
  • List the config(s) needed to be set to enable this change
• [N] Did you add sufficient unit test and/or integration test coverage for this PR?
  • Covered by existing tests and manual testing.
• [N] Does this change require modifying existing system tests or adding new system tests?
  • If so, include tracking information for the system test changes
• [N] Must this be released together with other change(s), either in this repo or another one?
  • If so, please include the link(s) to the changes that must be released together

References

JIRA:

Test & Review

Open questions / Follow-ups

[confluent-cla-assistant]

🎉 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.}

[sonarqube-confluent]

Analysis Details

0 Issues

• 0 Bugs
• 0 Vulnerabilities
• 0 Code Smells

Coverage and Duplications

• 8.30% Coverage (71.40% Estimated after merge)
• No duplication information (2.30% Estimated after merge)

Project ID: schema-registry

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