The `TscPlugin` interface using a type of `ts.CompilerHost&Partial<UnifiedModulesHost>` for the `host` parameter of the `wrapHost` method. However, prior to this change, the interface implementing `NgTscPlugin` class used a type of `ts.CompilerHost&UnifiedModulesHost` for the parameter. This change corrects the inconsistency and allows `UnifiedModulesHost` members to be optional when using the `NgtscPlugin`. PR Close #38004