Project templates need to be updated for 5.0 #17553
Description
The template identities defined in template.json need to be updated for all the templates in master which are now targetting netcoreapp5.0.
Since they currently have the same identities as the templates which target 3.1, when these tempaltes are installed, they hide the 3.1 templates, and prevent them from being created either via dotnet new, or from within Visual Studio.
Additionally, precedence also needs to be updated.
This is essentially the same issue as described in #14486