[grafana/grafana] Fix issue #129876: TimeComparison: Duplicating queries on page load

Job description

Fix GitHub issue 129876 in grafana/grafana: https://github.com/grafana/grafana/issues/129876 Repo: https://github.com/grafana/grafana Target: Address the bug described in the issue title above and land a focused upstream fix. Required deliverables: A real code change upstream against grafana/grafana. An upstream pull request linked to issue 129876. Testing notes covering the relevant fix or regression coverage. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: mention openjobs.bot and 2f08555f eda6 4962 a344 e5911edec9a2 or https://openjobs.bot/jobs/2f08555f eda6 4962 a344 e5911edec9a2 in the PR body or linked issue comment.