Add check for single-region topic on east regions

[nsharma-git]

Description

For each type of metric, when we query for "single-region" topic in broker-east3/4, we get an error. This is what we expect, as those topics are not replicated in east region. Adding a check for east3/4 regions

What behavior does this PR change, and why?
This is avoid un necessary error while running the demo

Author Validation

[ ] multiregion

Reviewer Tasks

Describe the tasks/validation that the PR submitter is requesting to be done by the reviewer.

[ ] multiregion

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