Replacing UNC path with drive letter on Azure

[raandree]

Description

When running on Azure the LabSources folder is accessed remotely which some installers don't like. Many of these cases can be solved by accessing the file via the mapped drive instead the UNC share.

• [x] - I have tested my changes.
• [x] - I have updated CHANGELOG.md and added my change to the Unreleased section
• [x] - The PR has a meaningful title.
• [x] - I updated my fork/branch and have integrated all changes from AutomatedLab.common/develop before creating the PR.

Type of change

• [ ] Bug fix
• [x] New functionality
• [ ] Breaking change
• [ ] Documentation

How was the change tested?

Installations for Exchange 2019 lab.

[nyanhp]

@raandree shouldn't that be checked in AutomatedLab? Even if AutomatedLab.Common shares the name, I thought our goal was to decouple the Common module from AutomatedLab

[raandree]

@nyanhp, right, the idea was not the best anyway. I will come up with a different approach.