* Replace the aspnet/JsonPatch git submodule and merge the master branch of its source to this repo
* Likewise for aspnet/DotNetTools
* And aspnet/HtmlAbstractions
* merge latest infrastructure changes from the release/2.2 branch
This removes EntityFrameworkCore as a git submodule. The EFCore repo will build on its own, and the AspNetCore repo will consume EFCore via PackageReference.
As a part of simplifying the way we build ASP.NET Core, the BrowserLink and Scaffolding repos and the packages they produce will be independent from aspnet/AspNetCore.
This refactors the targets used to build the shared framework and its .zip files. There are lots of reasons motivating this: Arcade convergence, migration to VSTS, making it easier to build this locally, etc.
Changes:
* Moves move content of build/Sharedfx.{props/targets} into eng/targets/SharedFx.Common.{props/targets}
* Update the build to produce a `runtime.$rid.Microsoft.AspNetCore.App` package (not just the one with symbols in it)
* Refactor the targets which produce .tar.gz/.zip files into separate projects in `src/Installers/`
* Refactor installers, unit tests, and the framework projects to use ProjectReference to flow dependencies between different parts of the build.
* Makes it easier to build the shared framework locally (for the inner dev loop, you can run `dotnet build -p src/Framework/Microsoft.AspNetCore.App/src/ -r win-x64`)
As a part of merging and reducing the number of repos we use, the aspnet/Common repo was renamed to aspnet/Extensions and it now builds on its own and not as a submodule of this repo.
Remove the aspnet/WebHooks universe from building with Universe.
This is part of consolidating repos and preparing aspnet/Universe to move into https://github.com/aspnet/AspNetCore