## What changes were proposed in this pull request?

This PR proposes to add cmd scripts so that Windows users can also run `spark-sql` script.

## How was this patch tested?

Manually tested on Windows.

**Before**

```cmd
C:\...\spark>.\bin\spark-sql
'.\bin\spark-sql' is not recognized as an internal or external command,
operable program or batch file.

C:\...\spark>.\bin\spark-sql.cmd
'.\bin\spark-sql.cmd' is not recognized as an internal or external command,
operable program or batch file.
```

**After**

```cmd
C:\...\spark>.\bin\spark-sql
...
spark-sql> SELECT 'Hello World !!';
...
Hello World !!
```

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #19808 from HyukjinKwon/spark-sql-cmd.