fix: set correct threshold for glgo apdex

This MR removes the 1024 threshold for glgo apdex to resolve empty apdex in https://dashboards.gitlab.net/d/general-service/general-service-platform-metrics?var-type=glgo. It will use le="1067.1895716335973" instead which is ~40ms higher.

The other alternative is 970.1723378487247. see thanos chart for all le options.

stackdriver_cloud_run_revision_run_googleapis_com_request_latencies_bucket{le="1024"} is empty since le="1024" is not a valid label.

See thanos for comparison.

See #152 (closed) for more background.