Log pattern tool improvement

[songkant-aws]

Description

Improve log pattern tool with cutting edge log pattern parser by introducing Brain algorithm mentioned in this RFC: opensearch-project/OpenSearch#16627

Related Issues

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[codecov]

Codecov Report

Attention: Patch coverage is 87.23404% with 30 lines in your changes missing coverage. Please review.

Project coverage is 82.11%. Comparing base (2b76e3c) to head (64837d7).
Report is 38 commits behind head on main.

Files with missing lines	Patch %	Lines
...ava/org/opensearch/agent/tools/LogPatternTool.java	81.08%	13 Missing and 8 partials ⚠️
...g/opensearch/agent/tools/utils/BrainLogParser.java	92.62%	5 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #474      +/-   ##
============================================
+ Coverage     81.78%   82.11%   +0.32%     
- Complexity      193      333     +140     
============================================
  Files            11       16       +5     
  Lines           961     1571     +610     
  Branches        137      221      +84     
============================================
+ Hits            786     1290     +504     
- Misses          121      194      +73     
- Partials         54       87      +33     

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