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### _Why are the changes needed?_
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The added sql module structure looks like:
```
kyuubi
  |
  - dev
      |
      - kyuubi-extension-spark_3.1
```

This PR mainly add 3 feature:
* merging small files automatically (include dynamic partition insertion case)
* insert shuffle node before Join to make AQE `OptimizeSkewedJoin` work
* stage level config isolation in AQE

Note that,  the sql rule  depend on the Apache Spark interface so we need make the sql module verion independence. Currently, this PR only supports the Spark 3.1.1.

Due to the version issue, we need to check and deploy this extension manually currently.

### _How was this patch tested?_
Add new test.

Closes #631 from ulysses-you/add-sql-module.

Closes #631

2cf12f1 [ulysses-you] version
cfbf72c [ulysses-you] address comment
7740ca6 [ulysses-you] module name
0f723eb [ulysses-you] workflow
45c23d8 [ulysses-you] line
80378f5 [ulysses-you] assembly
95528aa [ulysses-you] move module
5fe5d87 [ulysses-you] license
6578440 [ulysses-you] init work
Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: Kent Yao <yao@apache.org>