Drop table

[bannuanzz]

What problem were solved in this pull request?

Issue Number: drop table

Problem:

What is changed and how it works?

由于词法解析和语法解析原本代码里就带有
我在此修改了stmt 和executor 然后再storage里修改了handle db 和table 具体的代码实现逻辑是table里面的内容
具体可以看注释
此pr还增加了一些方便调试的内容。

Other information

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[hnwyllmm]

看起来是误提交。
不过.clang-tidy和clang-format的代码看起来挺有意思，可以提交上来吗？