Fixes#10501 and #8139.
This PR removes the Angular SSR documentation from the docs. When the Angular template initially shipped it included SSR as a built-in feature. Since we've moved the Angular template to be based on the Angular CLI, SSR is no longer included. Instead of trying to maintain our own instructions in the ASP.NET Core docs for enabling Angular SSR we recommend referring to the [Angular docs directly](https://angular.io/guide/universal).
Fixes#9219
@JunTaoLuo Dan calls out the implicit versioning "for 2.1 SDK or later;" however, we don't usually version the doc content by SDK release. We might need to say something for this update in the passage that I'm adding to the All topic (*aspnetcore/fundamentals/metapackage.md*) about which SDK version this applies to. I don't know if that's something that you would like to do or what version to call out.
I also remove the version from the samples. We also assume that devs are using the latest SDK with our samples.
Luke Latham
Ryan Brandenburg
Daniel Roth
Hassan Rezk Habib
Wade Pickett
Andrew Boza
Rick Anderson
haidelber
Scott Addie