Add Support for Alternate Legacy MULTIMATCH syntax

[forestmvey]

Description

Add support for alternative syntax of MULTI_MATCH relevance search functions. Legacy engine supports parameter keys as quoted, or unquoted values for both required and optional arguments. This syntax has been ported over to all relevance functions in the V2 engine.

Example Queries

SELECT * FROM stackexchange_beer WHERE MULTI_MATCH('query'='cicerone', 'fields'='Tags');
SELECT * FROM stackexchange_beer WHERE MULTIMATCH('query'='cicerone', 'fields'='Tags');
SELECT * FROM stackexchange_beer WHERE MULTIMATCHQUERY('query'='cicerone', fields='Tags');
SELECT * FROM stackexchange_beer WHERE MULTIMATCHQUERY(query='cicerone', 'fields'=['Title,Tags^2.0']);

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-commenter]

Codecov Report

Merging #1102 (523f974) into 2.x (d4d289c) will decrease coverage by 2.48%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                2.x    #1102      +/-   ##
============================================
- Coverage     98.28%   95.79%   -2.49%     
- Complexity     3454     3474      +20     
============================================
  Files           345      357      +12     
  Lines          8588     9333     +745     
  Branches        547      675     +128     
============================================
+ Hits           8441     8941     +500     
- Misses          142      334     +192     
- Partials          5       58      +53     

Flag	Coverage Δ
query-workbench	62.76% <ø> (?)
sql-engine	98.30% <100.00%> (+0.01%)	⬆️

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

Impacted Files	Coverage Δ
...g/opensearch/sql/executor/execution/QueryPlan.java	100.00% <ø> (ø)
...arch/storage/script/filter/FilterQueryBuilder.java	100.00% <ø> (ø)
.../org/opensearch/sql/executor/ExecutionContext.java	100.00% <100.00%> (ø)
...java/org/opensearch/sql/executor/QueryManager.java	100.00% <100.00%> (ø)
...java/org/opensearch/sql/executor/QueryService.java	100.00% <100.00%> (ø)
...rch/sql/executor/execution/StreamingQueryPlan.java	100.00% <100.00%> (ø)
...ecutor/streaming/MicroBatchStreamingExecution.java	100.00% <100.00%> (ø)
...h/sql/expression/function/BuiltinFunctionName.java	100.00% <100.00%> (ø)
...h/sql/expression/function/OpenSearchFunctions.java	100.00% <100.00%> (ø)
.../opensearch/sql/planner/physical/PhysicalPlan.java	100.00% <100.00%> (ø)
... and 13 more

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[penghuo]

please helping update doc

[dai-chen]

Thanks for the changes!