Code Review Bench PR #64536 - Allow JS root components to reinitialize on circuit restart

[tomerqodo]

Code Review Bench PR dotnet#64536

Original PR Title: Allow JS root components to reinitialize on circuit restart
Original PR Description: Fixes dotnet#64523.

Tests cleanup:

This PR reverts changes to tests architecture done in dotnet#64159 to avoid fixing multiple issues in one PR. It removes the additional test file and moves PersistentStateIsSupportedInDynamicJSRoots to PersistentState-connected test file.

Framework fixes:

The goal of the changes is to differentiate between the following scenarios:

Multi-Host / Different Renderer Types (Unsupported - Throws Error)

1. Host A initializes: A Server-rendered Blazor application starts
2. Circuit A connects: Server renderer (e.g., rendererId = 0)
3. .NET calls enableJSRootComponents: With Server's rendererId and managerInstance
4. JS state: manager is set, currentRendererId = 0
5. Host B attempts initialization: On the same page, a WebAssembly Blazor host is also loaded
6. WASM renderer calls enableJSRootComponents: With WebAssembly's rendererId (e.g., 1) and its own managerInstance.
7. Exception thrown: "Dynamic root components have already been enabled."
8. Developer responsibility: It's up to the developer to ensure only one host enables dynamic root components.

Same Renderer Type Circuit Restart (Supported)

1. Initial state (after 1st iteration): Circuit 1 was previously connected and then shut down
2. JS state: manager variable holds the old DotNetObjectReference from Circuit 1. currentRendererId holds the renderer ID (e.g., Server renderer = 0)
3. Circuit 2 connects: A new Blazor Server circuit is created (same renderer type - Server)
4. .NET calls enableJSRootComponents: The framework calls this with:

• Same rendererId] (e.g., 0 for Server)
• New managerInstance (a fresh DotNetObjectReference from Circuit 2)

5. No exception thrown: the new managerInstance replaces the old stale one
6. JS initializers skipped: hasInitializedJsComponents is already true, so initializers don't run again.
7. Circuit 2 becomes interactive: Components can now use Blazor.rootComponents.add() with the new valid manager.
   Original PR URL: Allow JS root components to reinitialize on circuit restart dotnet/aspnetcore#64536