fix(ai-gateway): fix histogram apdex thresholds to refer to existing buckets
To fix the apdex histograms in some SLIs in AI Gateway not referring to an existing bucket gitlab-org/gitlab#425095 (comment 1833203928)
To fix the apdex histograms in some SLIs in AI Gateway not referring to an existing bucket gitlab-org/gitlab#425095 (comment 1833203928)