清理查询模块代码，便于接入各种类型的数据库

[hhyo]

• mysql脱敏处理，统一异常信息
• 查询权限校验优化，统一异常信息
• 查询结果显示优化，错误信息统一在表格内展示
• 剔除mysql查询show create table 的权限校验
• 补充查询权限的测试用例

[codecov]

Codecov Report

Merging #83 into master will increase coverage by 2.67%.
The diff coverage is 56.41%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
+ Coverage   64.35%   67.03%   +2.67%     
==========================================
  Files          59       59              
  Lines        5729     5818      +89     
==========================================
+ Hits         3687     3900     +213     
+ Misses       2042     1918     -124

Impacted Files	Coverage Δ
sql/urls.py	100% <ø> (ø)	⬆️
sql/engines/tests.py	100% <100%> (ø)	⬆️
sql/engines/models.py	46.23% <100%> (ø)	⬆️
sql/tests.py	100% <100%> (ø)	⬆️
sql/sql_optimize.py	69.86% <12.5%> (-16.11%)	⬇️
sql/engines/inception.py	18.08% <14.28%> (-0.44%)	⬇️
sql/engines/mssql.py	77.27% <20%> (-2.49%)	⬇️
sql/query.py	47.96% <28.26%> (+3.73%)	⬆️
sql/engines/__init__.py	68.18% <33.33%> (-14.32%)	⬇️
sql/utils/data_masking.py	7.05% <4.1%> (-0.12%)	⬇️
... and 5 more

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[LeoQuote]

这里要不改成 if None in [sql_content, db_name, instance_name, limit_num]:

因为理论上来说and再否的话, 稍微有点低效

[hhyo]

可以的，我是感觉这些写着清爽点就改了，效率我还真不晓得