Factor out Forms and Authentication from Components

[SteveSandersonMS]

This came out of API review.

[SteveSandersonMS]

Also try to move the JSInterop reference out of Components altogether and into .Web.

[rynowak]

What were you thinking as package names?

Microsoft.AspNetCore.Components.Authorization?
Microsoft.AspNetCore.Components.Forms?
Microsoft.AspNetCore.Components.Validation?

[SteveSandersonMS]

.Authorization and .Forms

Did you prefer anything else?

[rynowak]

I wanted to put forward .Validation for consideration since the actual forms components are elsewhere.

However, I find .Forms to be agreeable as well, and I'm not proposing we change the namespace.

[brockallen]

Authentication or Authorization?

[rynowak]

It's both which is why I'm saying .Authorization - similar layering to server ASP.NET Core

It includes the integration point for authN IAuthenticationStateProvider and a set of components that take different actions based on authorization (using the same policy infrastructure as server ASP.NET Core).

[SteveSandersonMS]

Done in #12999