[Backport 2.x] Added RINT function to V2 engine

[opensearch-trigger-bot]

Backport 7220cfe from #1433

[codecov-commenter]

Codecov Report

Merging #1439 (0630379) into 2.x (0b6e581) will increase coverage by 0.00%.
The diff coverage is 100.00%.

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@@            Coverage Diff            @@
##                2.x    #1439   +/-   ##
=========================================
  Coverage     98.38%   98.38%           
- Complexity     3696     3699    +3     
=========================================
  Files           343      343           
  Lines          9115     9120    +5     
  Branches        582      582           
=========================================
+ Hits           8968     8973    +5     
  Misses          142      142           
  Partials          5        5           

Flag	Coverage Δ
sql-engine	98.38% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
...c/main/java/org/opensearch/sql/expression/DSL.java	100.00% <100.00%> (ø)
...h/sql/expression/function/BuiltinFunctionName.java	100.00% <100.00%> (ø)
...ssion/operator/arthmetic/MathematicalFunction.java	100.00% <100.00%> (ø)

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