[Backport 2.x] Refactor Flint Auth

[opensearch-trigger-bot]

Backport fca59a1 from #2190.

[codecov]

Codecov Report

Merging #2201 (6f06084) into 2.x (a88142c) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                2.x    #2201      +/-   ##
============================================
+ Coverage     96.59%   96.61%   +0.01%     
- Complexity     4752     4754       +2     
============================================
  Files           437      437              
  Lines         12699    12710      +11     
  Branches        859      860       +1     
============================================
+ Hits          12267    12280      +13     
  Misses          422      422              
+ Partials         10        8       -2     

Flag	Coverage Δ
sql-engine	96.61% <100.00%> (+0.01%)	⬆️

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

Files	Coverage Δ
...earch/sql/datasources/auth/AuthenticationType.java	100.00% <100.00%> (ø)
...ch/sql/datasources/glue/GlueDataSourceFactory.java	100.00% <100.00%> (ø)
...s/storage/OpenSearchDataSourceMetadataStorage.java	100.00% <100.00%> (+1.24%)	⬆️
...l/prometheus/storage/PrometheusStorageFactory.java	100.00% <ø> (ø)
.../asyncquery/model/S3GlueSparkSubmitParameters.java	100.00% <ø> (ø)
...earch/sql/spark/data/constants/SparkConstants.java	0.00% <ø> (ø)
...rch/sql/spark/dispatcher/SparkQueryDispatcher.java	100.00% <100.00%> (ø)