fix(runtime-core): fix SSR memoery leak due to props normalization cache

fix #2225

The previous props/emits normlaization was caching normalized result per
app instance, but during SSR there is a new app instance created for
every request.

The fix now de-opts props/emits normlaization caching when there are
props/emits declared in global mixins - which is a very rare use case.

packages/runtime-core/src/component.ts

@@ -79,11 +79,11 @@ export interface ComponentInternalOptions {
   /**
    * @internal
    */
-  __props?: Record<number, NormalizedPropsOptions>
+  __props?: NormalizedPropsOptions
   /**
    * @internal
    */
-  __emits?: Record<number, ObjectEmitsOptions | null>
+  __emits?: ObjectEmitsOptions | null
   /**
    * @internal
    */