[O11y][IIS] Format value in Bytes in `Bytes transferred/sec` panel

## Description

- [x]  Format values in Bytes in `Bytes transferred/sec` panel 
   - PR Link: https://github.com/elastic/integrations/pull/5727

Change format of Y-Axis values in Bytes for `Bytes transferred/sec` panel : 
 ![image](https://user-images.githubusercontent.com/89848966/228732636-006678c5-edc8-4a70-996d-021376605bcf.png)
