fix: make sure to correctly initialize health checks (#17765)

health checks were missing for drives replaced since

- HealFormat() would replace the drives without a health check
- disconnected drives when they reconnect via connectEndpoint()
  the loop also loses health checks for local disks and merges
  these into a single code.
- other than this separate cleanUp, health check variables to avoid
  overloading them with similar requirements.
- also ensure that we compete via context selector for disk monitoring
  such that the canceled disks don't linger around longer waiting for
  the ticker to trigger.
- allow disabling active monitoring.

cmd/globals.go

@@ -193,7 +193,7 @@ var (
 	globalBucketSSEConfigSys *BucketSSEConfigSys
 	globalBucketTargetSys    *BucketTargetSys
 	// globalAPIConfig controls S3 API requests throttling,
-	// healthcheck readiness deadlines and cors settings.
+	// healthCheck readiness deadlines and cors settings.
 	globalAPIConfig = apiConfig{listQuorum: "strict", rootAccess: true}
 
 	globalStorageClass storageclass.Config