Move Windows Rspec tests inside unit test module

Deleted the Windows Rspec CLI test module in the workflows YML and
moved the relevant code into the unit testing module. This solves the issue
where the oxen server would not instantiate within the Windows module.

.github/workflows/ci.yml

@@ -212,7 +212,6 @@ jobs:
         env:
           PATH: ${{ env.PATH }};${{ github.workspace }}/target/debug
         run: |
-          mkdir .\data\test\runs
           echo "Adding user"
           .\target\debug\oxen-server.exe add-user --email [email protected] --name Ox --output user_config.toml
           echo "Copying user config"