wip: more consistent compiler-sfc usage + inline mode for ssr

packages/runtime-core/src/componentOptions.ts

@@ -121,7 +121,6 @@ export interface ComponentOptionsBase<
   /**
    * SSR only. This is produced by compiler-ssr and attached in compiler-sfc
    * not user facing, so the typing is lax and for test only.
-   *
    * @internal
    */
   ssrRender?: (
@@ -136,6 +135,13 @@ export interface ComponentOptionsBase<
     $options: ComponentInternalInstance['ctx']
   ) => void
 
+  /**
+   * Only generated by compiler-sfc to mark a ssr render function inlined and
+   * returned from setup()
+   * @internal
+   */
+  __ssrInlineRender?: boolean
+
   /**
    * marker for AsyncComponentWrapper
    * @internal