Abstract ugly powershell artifact code into script

[matheusgomes28]

The following raw snippet feels out of place in the main YAML file

      - pwsh: |
          .\scripts\build_win_x64.ps1
          if(!$?) { Exit $LASTEXITCODE }
          New-Item -ItemType Directory -Force -Path "$(Build.SourcesDirectory)/artifacts"
          7z a -ttar "$(Build.SourcesDirectory)/artifacts/build_win_64.tar"  "build/"
          if(!$?) { Exit $LASTEXITCODE }
          7z a -tgzip "$(Build.SourcesDirectory)/artifacts/build_win_64.tar.gz" "$(Build.SourcesDirectory)/artifacts/build_win_64.tar"
          if(!$?) { Exit $LASTEXITCODE }
        displayName: 'Compile Code & Tests'
        workingDirectory: $(Build.SourcesDirectory)
        failOnStderr: true

Research a way to overcome all these if(!$?) { Exit $LASTEXITCODE } checks.