Refactor ConvertYamlConfigurationHandler

[Qianyi951015]

For #23854.

Changes proposed in this pull request:

• Replace ConvertYamlConfigurationHandler with ConvertYamlConfigurationExecutor

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• My code follows the code of conduct of this project.
• I have self-reviewed the commit code.
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• I have added corresponding unit tests for my changes.

[codecov-commenter]

Codecov Report

Merging #23896 (af0633d) into master (991e96a) will increase coverage by 0.01%.
The diff coverage is 67.85%.

❗ Current head af0633d differs from pull request most recent head b4ca270. Consider uploading reports for the commit b4ca270 to get more accurate results

@@             Coverage Diff              @@
##             master   #23896      +/-   ##
============================================
+ Coverage     50.17%   50.19%   +0.01%     
- Complexity     1570     1571       +1     
============================================
  Files          3247     3247              
  Lines         53455    53480      +25     
  Branches       9795     9799       +4     
============================================
+ Hits          26819    26842      +23     
+ Misses        24279    24278       -1     
- Partials       2357     2360       +3     

Impacted Files	Coverage Δ
...sphere/dbdiscovery/rule/DatabaseDiscoveryRule.java	64.10% <0.00%> (ø)
...ReplicationDatabaseDiscoveryProviderAlgorithm.java	19.04% <0.00%> (-2.01%)	⬇️
...here/mask/algorithm/MaskAlgorithmPropsChecker.java	100.00% <ø> (ø)
...e/mode/metadata/storage/StorageNodeDataSource.java	0.00% <ø> (ø)
...tor/subscriber/ConfigurationChangedSubscriber.java	79.41% <0.00%> (ø)
.../handler/distsql/ral/RALBackendHandlerFactory.java	70.73% <ø> (-0.70%)	⬇️
.../ShowStatusFromReadwriteSplittingRulesHandler.java	0.00% <0.00%> (ø)
...iteSplittingStorageUnitStatusStatementHandler.java	0.00% <0.00%> (ø)
...dbdiscovery/algorithm/DatabaseDiscoveryEngine.java	35.00% <44.44%> (+2.50%)	⬆️
...pe/MGRMySQLDatabaseDiscoveryProviderAlgorithm.java	53.62% <50.00%> (-0.11%)	⬇️
... and 16 more

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