Refactor single table meta data load

[tuichenchuxin]

Fixes #11718.

Changes proposed in this pull request:

• refactor single table load meta data.
• refactor TableMetaDataBuilder TableMetaDataLoader
• add test case

[codecov-commenter]

Codecov Report

Merging #11895 (0c24c7f) into master (dcc1d36) will increase coverage by 0.07%.
The diff coverage is 78.63%.

❗ Current head 0c24c7f differs from pull request most recent head 6b2689a. Consider uploading reports for the commit 6b2689a to get more accurate results

@@             Coverage Diff              @@
##             master   #11895      +/-   ##
============================================
+ Coverage     62.94%   63.01%   +0.07%     
- Complexity     1216     1228      +12     
============================================
  Files          2296     2302       +6     
  Lines         34891    34870      -21     
  Branches       6071     6059      -12     
============================================
+ Hits          21961    21974      +13     
+ Misses        11148    11114      -34     
  Partials       1782     1782              

Impacted Files	Coverage Δ
...ema/builder/loader/DefaultTableMetaDataLoader.java	80.95% <ø> (ø)
...data/schema/builder/TableMetaDataLoaderEngine.java	45.16% <45.16%> (ø)
...ata/schema/builder/SingleTableMetaDataBuilder.java	72.72% <72.72%> (ø)
...ilder/loader/dialect/MySQLTableMetaDataLoader.java	86.53% <80.00%> (+6.18%)	⬆️
...harding/metadata/ShardingTableMetaDataBuilder.java	62.79% <83.33%> (+3.33%)	⬆️
...lder/loader/dialect/OracleTableMetaDataLoader.java	85.91% <87.50%> (+7.24%)	⬆️
.../metadata/schema/builder/TableMetaDataBuilder.java	86.36% <88.88%> (-2.53%)	⬇️
.../builder/loader/dialect/H2TableMetaDataLoader.java	86.90% <90.90%> (+8.25%)	⬆️
.../encrypt/metadata/EncryptTableMetaDataBuilder.java	96.00% <100.00%> (+3.89%)	⬆️
...e/infra/metadata/schema/builder/SchemaBuilder.java	90.90% <100.00%> (+19.28%)	⬆️
... and 57 more

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[strongduanmu]

@tuichenchuxin Is it possible to use TableMetaDataLoaderEngine to load?

[tuichenchuxin]

@tuichenchuxin Is it possible to use TableMetaDataLoaderEngine to load?

At present, there are still some scenarios where DefaultTableMetaDataLoader.load is called separately, which has a lot of impact and has not been modified for the time being. In the future, the logic needs to be unified into the TableMetaDataLoaderEngine.