Fix nsfw link in mssql_clr_payload, and rubocop the module

[h00die]

fixes #19797

Replaces a now NSFW link with a wayback link. Apparently rubocop also ran :)

[bcoles]

metasploit-framework/documentation/modules/exploit/windows/mssql/mssql_clr_payload.md

Line 3 in 45fb4a7

This module is based on the work that was done by @leechristensen and @sekirkity as documented [here](http://sekirkity.com/command-execution-in-sql-server-via-fileless-clr-based-custom-stored-procedure/).

[msutovsky-r7]

Looks good to me

[msutovsky-r7]

Hi @h00die, I would probably rename PR as it's also little bit of code refactoring, so just to have it consistently

[bcoles]

Hi @h00die, I would probably rename PR as it's also little bit of code refactoring, so just to have it consistently

A reminder that this would be a non-issue if we could run rubocop -a over the entire code base in a single PR, which is blocked by requiring all modules to have Notes (#17582).