[sqlserver] Group perf counter rows by counter name before dispatch - #24876

• All required reviewers must approve this pull request before it can be merged. Learn more in our FAQ.

• Needs approval from Team: database-monitoring-agent

• Needs approval from Team: agent-integrations

  _{Questions about this check? Reach out in #dx-source-code-management on Slack.
  Digest: 24c20e8}

• All applicable files are owned properly
  _{Digest: 7872f0b}

• All applicable commits are signed and verified
  _{Digest: baafb8b}

if this seems incorrect, you can retrigger the evaluation of the MergeGate by clicking on this link