We need:

• - (PR Fix style issues in xUnit tests #8465) Fix style issues in xUnit tests
• - Add new xUnit tests to cover public APIs to increase reliability of hosting applications
• - Add benchmark tests to cover public APIs
• - Run xUnit test parallel on MacOs (VSTS)
• - Use method like WaitFile() in CleanupConfigFiles() from test_PSConfiguration.cs to exclude race condition with other tests. (CI fail)
• - investigate why the test TestRunspaceWithPowerShellAndInitialSessionState fail on MacOs with CreateDefault2() but pass with CreateDefault() (CI fail)
• - Could not find file '/home/vsts/.config/powershell/powershell.config.json'. (ci FAIL) (related issue Parallel Xunit tests seems to have a race condition causing random failures #8715)