Treat all ProjectRefs to SharedFx projects as PrivateAssets=all

[wtgodbe]

This is the way dotnet/runtime does it. Aspnetcore projects should not have any reference to SharedFx libraries in their .nuspecs. This allows us to get rid of our custom .nuspec-rewriting task, but forces us to explicitly list every required reference in every project, rather than relying on transitive references. Thanks @akoeplinger for doing much of the heavy lifting here. Required to unblock #64712

[Copilot]

Pull request overview

This PR aligns the ASP.NET Core project reference structure with the dotnet/runtime approach by treating all SharedFx project references as PrivateAssets=all. This eliminates the need for custom .nuspec-rewriting tasks but requires explicitly listing every required reference in each project file instead of relying on transitive references.

Key Changes:

• Removed reliance on transitive references from SharedFx libraries
• Added explicit references to all required ASP.NET Core packages in project files
• Ensured SharedFx libraries won't appear in NuGet package dependencies

Reviewed changes

Copilot reviewed 296 out of 403 changed files in this pull request and generated 60 comments.

Show a summary per file

File	Description
Authentication project files	Added explicit references to core authentication, HTTP, and abstractions packages
MVC test websites and projects	Added comprehensive references to MVC, Razor, routing, hosting, and server packages
OpenAPI projects	Added extensive HTTP, hosting, MVC, and server infrastructure references
Middleware projects	Added routing, hosting, HTTP abstractions, and feature packages
Identity projects	Added authentication, authorization, MVC, and data protection package references
Razor projects	Added HTML abstractions, hosting, HTTP, and hosting server packages
Routing and HTTP projects	Added abstractions and feature packages for HTTP and routing
Sample and test projects	Added comprehensive package references for hosting, HTTP, routing, and server components
Grpc interop helpers	Fixed initialization order and added error handling for startup failures
JsonPatch tests	Added conditional references for framework compatibility

[Copilot]

Duplicate references to "Microsoft.AspNetCore.Http" (lines 16 and 21) and "Microsoft.AspNetCore.Http.Abstractions" (lines 17 and 22) should be removed to avoid redundancy.

[Copilot]

Duplicate references to "Microsoft.AspNetCore.Http" (lines 16 and 21) and "Microsoft.AspNetCore.Http.Abstractions" (lines 17 and 22) should be removed to avoid redundancy.

Suggested change

	<Reference Include="Microsoft.AspNetCore.Http" />
	<Reference Include="Microsoft.AspNetCore.Http.Abstractions" />

[Copilot]

Duplicate references to "Microsoft.AspNetCore.Http" (lines 17 and 22) and "Microsoft.AspNetCore.Http.Abstractions" (lines 18 and 23) should be removed.

[Copilot]

Duplicate references to "Microsoft.AspNetCore.Http" (lines 17 and 22) and "Microsoft.AspNetCore.Http.Abstractions" (lines 18 and 23) should be removed.

Suggested change

	<Reference Include="Microsoft.AspNetCore.Http" />
	<Reference Include="Microsoft.AspNetCore.Http.Abstractions" />

[Copilot]

Duplicate references to "Microsoft.AspNetCore.Http" (lines 15 and 22), "Microsoft.AspNetCore.Http.Abstractions" (lines 16 and 23), and "Microsoft.AspNetCore.HttpOverrides" (lines 18 and 25) should be removed.

[Copilot]

Duplicate reference to "Microsoft.AspNetCore.Http.Abstractions" on lines 9 and 13 should be removed.

Suggested change

<Reference Include="Microsoft.AspNetCore.Http.Abstractions" />

[Copilot]

Duplicate reference to "Microsoft.AspNetCore.Http.Abstractions" on lines 45 and 46 should be removed.

Suggested change

<Reference Include="Microsoft.AspNetCore.Http.Abstractions" />

[Copilot]

Duplicate reference to "Microsoft.AspNetCore.Http.Abstractions" on lines 15 and 17 should be removed.

Suggested change

<Reference Include="Microsoft.AspNetCore.Http.Abstractions" />

[Copilot]

Duplicate reference to "Microsoft.AspNetCore.Routing.Abstractions" on lines 9 and 19 should be removed.

Suggested change

<Reference Include="Microsoft.AspNetCore.Routing.Abstractions" />

[Copilot]

The reference to "Microsoft.AspNetCore" appears to be newly added but may not be required given the other specific package references already included.

Suggested change

<Reference Include="Microsoft.AspNetCore" />