[feature request] support system as an install location for dotnet tools

[tmds]

dotnet tools can be installed for the current user, in a local manifest, or to a custom folder.

This request is for installing a tool so it becomes available for all users of a system.
For example: sudo dotnet tool install --system PowerShell

On Linux: similar like how this works with npm, the tools can be installed under /usr/local/lib/<command>/, with a symbolic link under /usr/local/bin/ to make these applications available on PATH.

cc @KathleenDollard

This came up in a discussion about shipping .NET apps/libraries on Linux in dotnet/docs#17757.
cc @richlander @leecow @nakarnam @dleeapho @omajid

[tmds]

cc @dagood

[tmds]

There aren't many thumbs up on this old feature request. Closing.