fix: Fixed OTel kafka dashboard queries

[shashank-reddy-nr]

Changes:

• Fixed OTel kafka dashboard queries.
• Optimized a few queries performance in OTel kafka dashboard.

Summary

A concise description of the changes being introduced. Please review the pre-merge checklist section to validate this pull request is ready for review and merge. If it is not ready, please mark the pull request as a draft.

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