[Fixes #12588][Blazor] Move Blazor to use Static Web Assets (#18409)

* [Blazor] Move Blazor to use Static Web Assets
* Plugs-in Blazor wasm through the static web assets infrastructure.
* Avoids the need for a custom Blazor.config file.
* Removes broken auto-rebuild and debug support.
* Removes unnecessary server-side Blazor helpers.