Support central of the metrics

[prudhvigodithi]

Description

Support central of the metrics in the https://opensearch.org/. The solution is based on this comment #69 (comment).

This PR should allow the Iframe embedding on for https://opensearch.org and DENY by default.

Issues Resolved

Part of #69 and #51

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.96%. Comparing base (1237830) to head (06d890e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main      #70   +/-   ##
=========================================
  Coverage     82.96%   82.96%           
  Complexity      202      202           
=========================================
  Files            53       53           
  Lines          1186     1186           
  Branches         48       48           
=========================================
  Hits            984      984           
  Misses          180      180           
  Partials         22       22           

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