Suppress unnecessary pipeline logging

Fixes MERC-6626

core/services/pipeline/runner.go

@@ -518,7 +518,7 @@ func (r *runner) run(ctx context.Context, pipeline *Pipeline, run *Run, vars Var
 	} else if run.HasErrors() {
 		l = l.With("run.AllErrors", run.AllErrors)
 		l.Debugw("Completed pipeline run with errors")
-	} else {
+	} else if r.config.VerboseLogging() {
 		l.Debugw("Completed pipeline run successfully")
 	}