Fix sqlserver metric collection row_key

[joelmarcotte]

What does this PR do?

Update sqlserver metric collection row_key to prevent overwriting metric information for two queries with the same query_plan_hash but part of two different stored procedures.

Motivation

We noticed that while we separate queries by stored procedure names, the row_key used to aggregate metrics is using query_plan_hash. This value can be identical since it's a hash of the plan nodes specific to this query, which can be shared in two different stored procedures. Changing the row_key to use the procedure name should fix this edge case.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.58%. Comparing base (d812e0e) to head (62429a9).
Report is 17 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
hive	?
hivemq	?
hudi	?
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?
sqlserver	91.14% <100.00%> (+11.39%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[nenadnoveljic]

Do we need a changelog entry? We're fixing a bug.