Add an integration test for Updating Topic with empty Authorization Rules

[anuchandy]

In this issue #34880, @haraldk reported that updating Topic with Authorization rules resulted in 400 bad request. Harald was kind enough to open a PR addressing this #34895

I've locally ran the repro-sample that Harald shared in the issue and was able to get the 400 error from the broker. I pulled and verified the proposed changes and it indeed fixed the bug.

Creating this issue to add a integration test for the same (i.e. copying the sample Harald shared to our integration test module)

Reference:

• https://github.com/Azure/azure-sdk-for-java/wiki/Test-Proxy-Migration#running-tests-in-record-mode
• https://github.com/Azure/azure-sdk-for-java/blob/main/eng/common/TestResources/README.md