[Backport 2.9] Fixed exception when datasource is updated with existing configuration.

[opensearch-trigger-bot]

Backport b3fd4c4 from #2006.

[codecov]

Codecov Report

Merging #2009 (7a34c7e) into 2.9 (02da891) will increase coverage by 0.04%.
Report is 3 commits behind head on 2.9.
The diff coverage is 99.56%.

@@             Coverage Diff              @@
##                2.9    #2009      +/-   ##
============================================
+ Coverage     97.34%   97.39%   +0.04%     
- Complexity     4524     4604      +80     
============================================
  Files           394      401       +7     
  Lines         11166    11389     +223     
  Branches        810      844      +34     
============================================
+ Hits          10870    11092     +222     
- Misses          289      290       +1     
  Partials          7        7              

Flag	Coverage Δ
sql-engine	97.39% <99.56%> (+0.04%)	⬆️

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Files Changed	Coverage Δ
...earch/sql/spark/data/constants/SparkConstants.java	0.00% <0.00%> (ø)
...s/storage/OpenSearchDataSourceMetadataStorage.java	98.75% <100.00%> (+<0.01%)	⬆️
...org/opensearch/sql/spark/client/EmrClientImpl.java	100.00% <100.00%> (ø)
...esponse/DefaultSparkSqlFunctionResponseHandle.java	100.00% <100.00%> (ø)
...nctions/scan/SparkSqlFunctionTableScanBuilder.java	100.00% <100.00%> (ø)
...ctions/scan/SparkSqlFunctionTableScanOperator.java	100.00% <100.00%> (ø)
...a/org/opensearch/sql/spark/helper/FlintHelper.java	100.00% <100.00%> (ø)
...g/opensearch/sql/spark/response/SparkResponse.java	100.00% <100.00%> (ø)
...va/org/opensearch/sql/spark/storage/SparkScan.java	100.00% <100.00%> (ø)
...nsearch/sql/spark/storage/SparkStorageFactory.java	100.00% <100.00%> (ø)
... and 1 more