Fix sidekiq.jobs.perform.count metric type (DataDog#20638)

* Fix `sidekiq.jobs.perform.count` metric type

* Update metadata.csv description

Author: dkirov-dd

sidekiq/assets/dashboards/overview.json

@@ -208,7 +208,7 @@
 		"definition": {
 			"type": "timeseries",
 			"requests": [{
-				"q": "avg:sidekiq.jobs.perform.median{*}, avg:sidekiq.jobs.perform.avg{*}, avg:sidekiq.jobs.perform.count{*}, avg:sidekiq.jobs.perform.max{*}",
+				"q": "avg:sidekiq.jobs.perform.median{*}, avg:sidekiq.jobs.perform.avg{*}, avg:sidekiq.jobs.perform.max{*}",
 				"display_type": "area",
 				"style": {
 					"palette": "dog_classic",

sidekiq/metadata.csv

@@ -11,7 +11,7 @@ sidekiq.jobs.expired,count,,job,,Count of when a job is expired,0,sidekiq,jobs e
 sidekiq.jobs.failure,count,,job,,Total count of failed Sidekiq jobs,-1,sidekiq,jobs failure,
 sidekiq.jobs.perform.95percentile,gauge,,millisecond,,95th percentile of amount of time spent in a worker,0,sidekiq,jobs perform perc,
 sidekiq.jobs.perform.avg,gauge,,millisecond,,Average amount of time spent in a worker,0,sidekiq,jobs perform avg,
-sidekiq.jobs.perform.count,gauge,,millisecond,,Count of the amount of time spent in a worker,0,sidekiq,jobs perform count,
+sidekiq.jobs.perform.count,count,,,,The number of times that the amount of time spent in a worker was measured,0,sidekiq,jobs perform count,
 sidekiq.jobs.perform.max,gauge,,millisecond,,Max amount of time spent in a worker,0,sidekiq,jobs perform max,
 sidekiq.jobs.perform.median,gauge,,millisecond,,Median amount of time spent in a worker,0,sidekiq,jobs perform median,
 sidekiq.jobs.recovered.fetch,count,,job,,Count of when a job is recovered by super_fetch after process crash,0,sidekiq,jobs recovered fetch,