Improve processing OpenSearch data types. Fix using subfields for text type.

[Yury-Fridlyand]

Description

See doc for technical details: https://github.com/Bit-Quill/opensearch-project-sql/blob/dev-add-text-type/docs/dev/text-type.md
See also this comment describing some changes.

Please, see team review and discussion in Bit-Quill#299.

Issues Resolved

1. Pass full types (instances of OpenSearchDataType) though :core module instead of simplified ones (ExprCoreType).
   This unblocks access to important mapping info such as text fields or date formats. This info is required to build proper DSL queries to OpenSearch.
2. Use text fields instead of hardcoded keyword subfield name.

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 #2003 (64bdbc0) into main (6055c7e) will increase coverage by 0.00%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##               main    #2003   +/-   ##
=========================================
  Coverage     97.30%   97.30%           
- Complexity     4622     4645   +23     
=========================================
  Files           407      407           
  Lines         11934    11966   +32     
  Branches        827      837   +10     
=========================================
+ Hits          11612    11644   +32     
  Misses          315      315           
  Partials          7        7           

Flag	Coverage Δ
sql-engine	97.30% <100.00%> (+<0.01%)	⬆️

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Files Changed	Coverage Δ
...in/java/org/opensearch/sql/data/type/ExprType.java	100.00% <100.00%> (ø)
...org/opensearch/sql/data/type/WideningTypeRule.java	100.00% <100.00%> (ø)
...h/sql/opensearch/data/type/OpenSearchDataType.java	100.00% <100.00%> (ø)
...h/sql/opensearch/data/type/OpenSearchDateType.java	100.00% <100.00%> (ø)
...h/sql/opensearch/data/type/OpenSearchTextType.java	100.00% <100.00%> (ø)
...nsearch/data/value/OpenSearchExprValueFactory.java	100.00% <100.00%> (ø)
...search/sql/opensearch/storage/OpenSearchIndex.java	100.00% <100.00%> (ø)
...ript/aggregation/dsl/AggregationBuilderHelper.java	100.00% <100.00%> (ø)
...ensearch/storage/script/core/ExpressionScript.java	100.00% <100.00%> (ø)
...search/storage/script/filter/lucene/LikeQuery.java	100.00% <100.00%> (ø)
... and 2 more