types: improve h() and TSX type inference

- Should allow extraneous props as attrs in TSX
- Should check props when using constructor type returned by
  createComponent() in h()

packages/runtime-core/src/apiOptions.ts

@@ -65,6 +65,10 @@ export interface ComponentOptionsBase<
   components?: Record<string, Component>
   directives?: Record<string, Directive>
   inheritAttrs?: boolean
+
+  // type-only differentiator to separate OptionWihtoutProps from a constructor
+  // type returned by createComponent()
+  __isConstructor?: never
 }
 
 export type ComponentOptionsWithoutProps<