Integrate InterruptStatsMonitor with KernelMonitor (#375)

Summary:
Pull Request resolved: #375

Use InterruptStatsMonitor to collect the interrupt stats from procfs. These stats are eventually picked up by the monitoring thread.

Reviewed By: homie-homin

Differential Revision: D74770810

Author: abhiShedge

dynolog/src/procfs/parser/InterruptStatsMonitor.h

@@ -17,6 +17,8 @@ struct InterruptStats {
   int64_t eth0Intrps, eth0IntrpsPrev;
 };
 
+// The Ticket template is configured to have the major tick at 60sec, minor at
+// 1sec intervals
 class InterruptStatsMonitor : MonitorBase<Ticker<60000, 1000, 1, 2>> {
  private:
   std::string const rootDir_;