Spark Execution Engine Config Refactor

[vamsimanohar]

Description

• Refactoring for Spark Execution Engine Config Reading.
• SparkExecutionEngineConfigClusterSetting is the POJO class for reading plugins.query.executionengine.spark.config cluster setting.
• SparkExecutionEngineConfigSupplier is the new interface responsible for providing the configuration to AsyncQueryExecutorService.
• SparkExecutionEngineConfig is the Interface between AsyncQueryExecutorService and SparkExecutionEngineConfigSupplier.

Issues Resolved

[List any issues this PR will resolve]

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 #2249 (cf86fa0) into main (55e8e84) will increase coverage by 0.01%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #2249      +/-   ##
============================================
+ Coverage     96.59%   96.60%   +0.01%     
- Complexity     4730     4738       +8     
============================================
  Files           439      442       +3     
  Lines         12691    12741      +50     
  Branches        871      876       +5     
============================================
+ Hits          12259    12309      +50     
  Misses          424      424              
  Partials          8        8              

Flag	Coverage Δ
sql-engine	96.60% <100.00%> (+0.01%)	⬆️

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

Files	Coverage Δ
...park/asyncquery/AsyncQueryExecutorServiceImpl.java	100.00% <100.00%> (ø)
...nfig/SparkExecutionEngineConfigClusterSetting.java	100.00% <100.00%> (ø)
...config/SparkExecutionEngineConfigSupplierImpl.java	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes