[MSSQL] Fix file exist error

[Dfte]

Hello,

This PR fixes the "file exists" error when the remote MSSQL server is not configured in english (see #1998).

Now it works no matter what the language is:

:)

(This PR requires #2001 to be merged first)

[gabrielg5]

Hey @Dfte, hello!

Been checking this one. Some notes:

• We should add the impacket.mssql package in setup.py
• In the version_name property of MSSQL_VERSION class, what if we just pass on KeyError?
  I tried with a couple SQLServer instances and got Microsoft SQL Server 2014 (unknown) (12.0.6179) and Microsoft SQL Server 2019 (unknown) (15.0.2135) for example. If we just pass on that exception at worst we'd say Microsoft SQL Server (<major>.<minor>.<build>)

As an FYI only because change is ok :)... there's a boolean parameter tuplemode in the sql_query function to return rows as list instead than dictionary. Perhaps useful in the scenario of the "File Exists" fix

(Think I'll be only checking this one and close #2001 as those changes are also included in here)

[Dfte]

Ayo!! I have added impacket.mssql to the setupd.py and modified the version_name to pass on keyerror exception.

As for the file exist dict/list, good to know but the patch I have writen should be enough :)!

Let me know if you need anything else :)