Add -WhatIf to Update-DbcPowerBiDataSource

[shaneis]

Feature Request

I would like the ability to see what the command Update-DbcPowerBiDataSource will do / create before I run it, mainly for what the file name will be, etc.

New Check

N/A.

What would you like to check?

What should be configurable for the results of the check ?

• No configurations needed.
• No default values needed.

What should be able to be excluded from being tested ?

N/A.

Additional information

I've implemented this in my current environment.
I've to create Pester tests to make it's doing what is expected but I'll create a Pull Request of the changes in the meantime.