message: Fix runner integration test.
  This test is broken, as it first sets environment variables, and then
  immediately unsets it again.
  This only worked by chance with the legacy tracer, and breaks the Lua
  tracer.
diff: @@ -167,7 +167,6 @@ jobs:
  shell: powershell
  run: |
  cat ./codeql-runner/codeql-env.sh | Invoke-Expression
  - $Env:CODEQL_EXTRACTOR_CSHARP_ROOT = "" # Unset an environment variable to make sure the tracer resists this
  & $Env:CODEQL_RUNNER dotnet build /p:UseSharedCompilation=false
  - name: Upload tracer logs
  