Add PSUseShouldProcess support for Set-WTerraformVersion

[WhiteTomX]

PSScriptanalyzer complains about PSUseShouldProcess. The function is not changing much, but it changes file system and config, so we should impletement ShoulProcess for that.

Expected Behavior

PSScriptanalyzer does not complain anymore
If running Set-WTerraform -Version 0.14.0 -Confirm Should ask for confirmation for downloading Terraform and for adding path to config.

Current Behavior

Weid things

Possible Solution

Context

Not realy important but let's do it anyway.

Your Environment

• Module version used: 0.0.1
• Operating System and PowerShell version: 5.1