fix: correctly capture rows returned for scalable push query metrics

[nateab]

Description

What behavior do you want to change, why, how does your patch achieve the changes?
Correctly capture rows returned for scalable push query metrics, by using a TransientQueryQueue in the scalable push query metadata, since that is the queue we pass in anyway during instantiation.

Testing done

Describe the testing strategy. Unit and integration tests are expected for any behavior changes.
Unit tests updated

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")