refactor: 优化构造SQL性能

[zhou-hao]

自定义条件时, 建议根据情况使用 BatchSqlFragments或者SqlFragments#single,of 或者 SimpleSqlFragments.of。

in等操作需要拼接多个?,?时,可以使用 SqlUtils#createQuestionMarks

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 64.12556% with 240 lines in your changes are missing coverage. Please review.

Project coverage is 62.07%. Comparing base (d77de93) to head (dd282ca).

Files	Patch %	Lines
...ports/postgres/PostgresqlSaveOrUpdateOperator.java	0.00%	35 Missing ⚠️
...a/org/hswebframework/ezorm/rdb/utils/FlatList.java	52.54%	25 Missing and 3 partials ⚠️
.../rdb/supports/mysql/MysqlSaveOrUpdateOperator.java	0.00%	23 Missing ⚠️
.../builder/fragments/SimpleTermsFragmentBuilder.java	61.29%	7 Missing and 5 partials ⚠️
...lder/fragments/update/DefaultUpdateSqlBuilder.java	70.73%	8 Missing and 4 partials ⚠️
...pports/postgres/PostgresqlBatchUpsertOperator.java	57.14%	10 Missing and 2 partials ⚠️
...zorm/rdb/metadata/AbstractTableOrViewMetadata.java	57.69%	11 Missing ⚠️
...orm/rdb/supports/mssql/SqlServer2012Paginator.java	31.25%	11 Missing ⚠️
...b/supports/mssql/SqlServerBatchUpsertOperator.java	57.69%	9 Missing and 2 partials ⚠️
...uilder/fragments/insert/BatchInsertSqlBuilder.java	74.28%	7 Missing and 2 partials ⚠️
... and 19 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #72      +/-   ##
============================================
+ Coverage     62.05%   62.07%   +0.02%     
- Complexity     2100     2142      +42     
============================================
  Files           329      334       +5     
  Lines          8749     8939     +190     
  Branches        841      873      +32     
============================================
+ Hits           5429     5549     +120     
- Misses         2876     2930      +54     
- Partials        444      460      +16     

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