MM-25005: Remove HttpRequestsDuration bucket (#14520)

* MM-25005: Remove HttpRequestsDuration bucket

The ApiTimesHistograms already captures what HttpRequestsDuration does.
And it's more granular than that. So there's no need to duplicate stuff.
Let's remove this one.

* Updating resource class to xlarge

Co-authored-by: mattermod <mattermod@users.noreply.github.com>
Co-authored-by: Jason Deland <jaydeland@gmail.com>

einterfaces/metrics.go

@@ -16,7 +16,6 @@ type MetricsInterface interface {
 
 	IncrementHttpRequest()
 	IncrementHttpError()
-	ObserveHttpRequestDuration(elapsed float64)
 
 	IncrementClusterRequest()
 	ObserveClusterRequestDuration(elapsed float64)