[Service Bus]Update tests for improved describe and it names

[ramya-rao-a]

Fixes #1231 with the below rules:

• describe sections to have short names
• each it starts with entity type (queue/subscription/topic partition/unpartition session)
• exception to the previous point are the renewLock files that group tests by entity
• When running locally, it is the individual test names that show up. These should be self explanatory
• When running in CI, the failed tests have the describe section's name prefixed, making the entire text long. This text should be self explanatory without needing to scroll till the end. This is done by ensuring the information in the describe section when repeated in the tests appears in the end.

@ramya0820 Did you have any other points in mind when you logged #1231?

[ramya0820]

• Can we organize all tests to mimic renew lock tests structure?
  The organization we have based on entities is less error prone if in future we modify tests that we want to add
  For the other tests, it's currently not that easy to replicate/copy-paste any new/modofied tests as it is in renewLock tests.

• Also, the message prefix construction is still not uniform, I think having something like below for all tests would help.
  <entity type (Queue/Topic)> <feature-1 (Partition/Unpartitioned> <feature-2 (Session/Non-session)> <test-title> <test-case-title>

• Above is also easier to extend across namespaces for later.

[ramya0820]

Discussed offline, approving this PR as we wanted to just modify the text a little for now and pick up remaining items in issue later.