[fix] [PoC] Fix parent component link for web components

[jsonn]

This is a proof of concept for fixing the parent component link for nested web components, e.g. when using

   <my-parent-component>
      <my-child-component></my-child-component>
  </my-parent-component

we want the child to have a parent component link set appropriately, so that e.g. the context API (see #3422) works correctly. The test itself is a bit rough and likely can be optimized by checking for the $$ property first, but I'd like to get idea out first.