[Spotless] Applying Google Code Format for ppl files #12

[MitchellGale]

Description

Applies spotless for ppl directory in project. Sets checkstyle to not fail on failure for ppl directory.

Issues Resolved

#1101

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

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

Merging #1972 (1128c4d) into main (5381a6f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #1972   +/-   ##
=========================================
  Coverage     97.51%   97.51%           
  Complexity     4656     4656           
=========================================
  Files           408      408           
  Lines         11930    11932    +2     
  Branches        829      829           
=========================================
+ Hits          11634    11636    +2     
  Misses          289      289           
  Partials          7        7           

Flag	Coverage Δ
sql-engine	97.51% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...opensearch/sql/ppl/parser/AstStatementBuilder.java	83.33% <ø> (ø)
...opensearch/sql/ppl/utils/UnresolvedPlanHelper.java	100.00% <ø> (ø)
...c/main/java/org/opensearch/sql/ppl/PPLService.java	100.00% <100.00%> (ø)
.../org/opensearch/sql/ppl/antlr/PPLSyntaxParser.java	100.00% <100.00%> (ø)
...org/opensearch/sql/ppl/domain/PPLQueryRequest.java	100.00% <100.00%> (ø)
...rg/opensearch/sql/ppl/domain/PPLQueryResponse.java	100.00% <100.00%> (ø)
...java/org/opensearch/sql/ppl/parser/AstBuilder.java	100.00% <100.00%> (ø)
...pensearch/sql/ppl/parser/AstExpressionBuilder.java	100.00% <100.00%> (ø)
.../org/opensearch/sql/ppl/utils/ArgumentFactory.java	100.00% <100.00%> (ø)
...ensearch/sql/ppl/utils/PPLQueryDataAnonymizer.java	100.00% <100.00%> (ø)