Change LIKE operator case-insensitive match

[penghuo]

Signed-off-by: Peng Huo penghuo@gmail.com

Description

1. Change LIKE operator PATTERN to case-insensitive.
2. Update docs for SQL and PPL.

Issues Resolved

#1156

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[codecov-commenter]

Codecov Report

Merging #1160 (6146db6) into 2.x (c5e8fc0) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##                2.x    #1160   +/-   ##
=========================================
  Coverage     98.31%   98.31%           
  Complexity     3521     3521           
=========================================
  Files           342      342           
  Lines          8700     8701    +1     
  Branches        554      554           
=========================================
+ Hits           8553     8554    +1     
  Misses          142      142           
  Partials          5        5           

Flag	Coverage Δ
sql-engine	98.31% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
...n/java/org/opensearch/sql/utils/OperatorUtils.java	100.00% <100.00%> (ø)
...search/storage/script/filter/lucene/LikeQuery.java	100.00% <100.00%> (ø)

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[dai-chen]

Thanks for the fix!