Refactor cluster-mode-example with ShardingSphereDriver

[Pace2Car]

For #22469.

Changes proposed in this pull request:

• Refactor cluster-mode-example with ShardingSphereDriver
• Remove Spring configuration example

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Before committing this PR, I'm sure that I have checked the following options:

• My code follows the code of conduct of this project.
• I have self-reviewed the commit code.
• I have (or in comment I request) added corresponding labels for the pull request.
• I have passed maven check locally : ./mvnw clean install -B -T1C -Dmaven.javadoc.skip -Dmaven.jacoco.skip -e.
• I have made corresponding changes to the documentation.
• I have added corresponding unit tests for my changes.

[codecov-commenter]

Codecov Report

Merging #22542 (12c1fd5) into master (ee7db7d) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #22542      +/-   ##
============================================
- Coverage     50.98%   50.93%   -0.05%     
- Complexity     2514     2515       +1     
============================================
  Files          4185     4189       +4     
  Lines         58237    58289      +52     
  Branches       9902     9912      +10     
============================================
- Hits          29694    29692       -2     
- Misses        26013    26066      +53     
- Partials       2530     2531       +1     

Impacted Files	Coverage Δ
...handler/distsql/ral/hint/enums/HintSourceType.java	0.00% <0.00%> (-42.86%)	⬇️
...trics/prometheus/collector/BuildInfoCollector.java	62.50% <0.00%> (-6.25%)	⬇️
...eger/definition/JaegerPluginDefinitionService.java	88.88% <0.00%> (-5.23%)	⬇️
...pkin/definition/ZipkinPluginDefinitionService.java	88.88% <0.00%> (-5.23%)	⬇️
...definition/OpenTracingPluginDefinitionService.java	88.88% <0.00%> (-5.23%)	⬇️
...n/OpenTelemetryTracingPluginDefinitionService.java	88.88% <0.00%> (-5.23%)	⬇️
.../definition/PrometheusPluginDefinitionService.java	47.61% <0.00%> (-2.39%)	⬇️
...rometheus/service/PrometheusPluginBootService.java	66.66% <0.00%> (-1.34%)	⬇️
...re/agent/core/plugin/PluginBootServiceManager.java	0.00% <0.00%> (ø)
...pi/definition/AbstractPluginDefinitionService.java	0.00% <0.00%> (ø)
... and 13 more

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