Document use of universal packages

[TravisEz13]

Summary of the new document or enhancement

• List of articles that need to be updated:
  https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/reference/docs-conceptual/install/Installing-PowerShell-Core-on-Linux.md

• New articles that need to be created:

• Link(s) to related code PR(s) in the PowerShell/PowerShell repo:
  Make Linux package universal. PowerShell/PowerShell#15109

• Link(s) to related issue(s) in the PowerShell/PowerShell repo:
  Consolidate Linux packages PowerShell/PowerShell#14848

Description of what changed

everything will remain the same prior to 7.2 as this is a breaking change.

7.2 and later, the package name for all deb and RPM platforms will be the same.
repo names will still vary per distro, as other products may not be able to be so universal.

[sdwheeler]

@TravisEz13 We are going to need install instructions for this new package.

[TravisEz13]

installing from the repo will be the same for each distro, so it won't save a lot there.

installing from the package, the instructions will be more similar, except where there are workarounds or extra steps

[sdwheeler]

@TravisEz13 Can you update the notes on this issue? What are the workarounds or extra steps?

[TravisEz13]

right now, they are hypothetical.

[sdwheeler]

Fixed in #8148