add docs for new promql query options

[joshuali925]

Description

add docs for opensearch-project/OpenSearch-Dashboards#12644

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.62%. Comparing base (d09e68d) to head (491f298).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #438   +/-   ##
=======================================
  Coverage   55.62%   55.62%           
=======================================
  Files           4        4           
  Lines         169      169           
  Branches       47       48    +1     
=======================================
  Hits           94       94           
  Misses         74       74           
  Partials        1        1           

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