Refactor reload SingleTableRule logic when curd single table

[zhaojinchao95]

Fixes #19013

[menghaoranss]

@ZjcNB please fix it

[zhaojinchao95]

@ZjcNB please fix it

Ok, i will check

[codecov-commenter]

Codecov Report

Merging #20053 (59925b4) into master (bebe441) will increase coverage by 0.02%.
The diff coverage is 63.15%.

@@             Coverage Diff              @@
##             master   #20053      +/-   ##
============================================
+ Coverage     60.62%   60.65%   +0.02%     
- Complexity     2414     2415       +1     
============================================
  Files          3850     3850              
  Lines         54704    54707       +3     
  Branches       7672     7673       +1     
============================================
+ Hits          33164    33182      +18     
+ Misses        18685    18667      -18     
- Partials       2855     2858       +3     

Impacted Files	Coverage Δ
...sher/type/CreateTableStatementSchemaRefresher.java	11.76% <0.00%> (ø)
...ardingsphere/singletable/rule/SingleTableRule.java	60.63% <0.00%> (-0.66%)	⬇️
...he/shardingsphere/mode/manager/ContextManager.java	62.77% <28.57%> (-1.07%)	⬇️
...nfra/metadata/database/ShardingSphereDatabase.java	84.61% <100.00%> (+17.11%)	⬆️
...data/database/rule/ShardingSphereRuleMetaData.java	86.66% <0.00%> (-6.67%)	⬇️
...distsql/ral/queryable/ShowInstanceInfoHandler.java	87.50% <0.00%> (ø)
...handler/distsql/ral/hint/enums/HintSourceType.java	42.85% <0.00%> (+42.85%)	⬆️
...distsql/ral/queryable/ShowInstanceListHandler.java	76.92% <0.00%> (+76.92%)	⬆️

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