Add tests for Projects functions

[marranaga]

Need to implement Pester tests for all functions to increase code coverage

• Get-GitlLabProjectFork
• Get-GitlLabProjectFork
• Get-GLProjectLanguages
• Get-GLProjectUsers
• Get-GLUserProject
• Invoke-GLProjectArchive
• Invoke-GLProjectUnarchive
• New-GLProject
• New-GLProjectFork
• Get-GitlLabUserProject
• Remove-GLProject
• Update-GLProject