Scrape all metrics and add them to cps documentation

Scrape all metrics and add them to cps documentation

- add a new dummy annotation (TimedCustom) for Gauge metrics (cm handle state)
- add a description field for the counter annotation (CountCmHandleSearchExecution)
- add a python script (with tests) to scrape the metrics mentioned above
  using a single regex for all
- remove redundancies (distribution management) from pom.xml of
  checkstyle module since there is no artifact released from checkstyle
- import and display the output (metrics.cvs) in admin-guide docs

Issue-ID: CPS-2709

Change-Id: Iaee23f0a20c05e5aea033baacad1f23cb61e8b34
Signed-off-by: halil.cakal <halil.cakal@est.tech>