We can rely on the pre-installed PSResourceGet and we can re-enable tests!

And remove test that's no longer run since <7.4 has been dropped.

…e better (#2224)

* Add Documentation to Parameters and Variables if Present

* Add tests

* Handle variables

* Fix CompletesAttributeValue Test

* Fix Rosyn Analyzer Nit on Liq Select

* Change variable label handling

* Improve E2E Test Fixtures to be less flaky

* Adjust test skips

* Fix dangling IsLinux reference

* Kick Hover Test issue can down the road

* Make CanSendGetCommandRequestAsync Skip in CI Again

* Remove unneded using namespace

* Bump GetCommandRequest to 2 minutes
It took longer than 1 minute in Github Actions!

* Skip HoverRequest on Windows for Now

* Swap management for utility command and ensure help is cached.

* Fix symbol test regression oopsie

* Update POST

* Fix DSC Test
Contengent assuming #2208 (comment) is OK from @andyleejordan

* Fix Help Update Process

* Add upterm debugging to pipeline

* Expand help update to all potential pwsh versions

* Add PS7 Help

* Try Help CAB again

* Apparently it's a zip not a cab on Linux...

* Fixup PS5.1 Help Script

* Switch to Microsoft.PowerShell.Archive for help tests for smaller artifact size.

* Clean up build script comments

---------

Co-authored-by: Andy Jordan <2226434+andyleejordan@users.noreply.github.com>

This info is in the readme.

Thanks dotnet-outdated.