Update latest tracing benchmark SLOs

[sarahchen6]

What Does This Do

Update latest macrobenchmark benchmark failure thresholds based on automatically generated SLOs

Motivation

The benchmarks are stable according to the APM SDKs Perf SLOs dashboard, but they have been emitting warnings for the past few weeks. Loosen the threshold with T=15% to avoid these noisy warnings while still maintaining a strict threshold. The values were auto-generated based on the latest runs of master, so even with the increase of T from 10 to 15%, some thresholds tightened.

Additional Notes

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Jira ticket: [PROJ-IDENT]

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