The PR resolves some style issues in engine code. (Moved from PR #7242. )

Remove code from build.psm1 that save the modules to a versioned folder. For servicing reasons after release it is preferred and easier to not have the versioned folder so that we can directly replace modules that need to be serviced (MSI specifically makes it difficult to service a module if the folder path changes).

When trying to build on RHEL, the environment is not recognized as RedHatFamily.
Added detection logic so that appropriate symbolic links are generated.

Update Start-PSPester and Start-PSxUnit to upload test results when running in VSTS
Disable tests which require non-root using when running as root
remove verifications in Test-Connection tests which verify buggy behavior
Skip tests which don't behave correctly in VSTS (due to running in a container?)
- Test-Connection - #7528
- Set-Date - #7529

Added fix to remove unneeded validation attribute for Arguments parameter, and made tests work with strict mode.

I missed this in reviewing #7518