[AUTO] Increment version to 2.18.0.0

[opensearch-trigger-bot]

• Incremented version to 2.18.0.0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.85%. Comparing base (37c98ef) to head (a85ccb6).
Report is 1 commits behind head on 2.x.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.x    #2120      +/-   ##
==========================================
+ Coverage   71.40%   73.85%   +2.45%     
==========================================
  Files          97       97              
  Lines        2651     2651              
  Branches      404      411       +7     
==========================================
+ Hits         1893     1958      +65     
  Misses        642      642              
+ Partials      116       51      -65     

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