(fix) don't rename props name when triggered in shorthand

[jasonlyu123]

Found this while figuring out #1863

If you trigger the rename in the shorthand of ComponentB in ComponentA, we'll check the props rename for ComponentA. And if they have the same name, for example

<script>
import ComponentB from './ComponentB.svelte'
export let name;
</script>

<ComponentB {name} /> <!--trigger here in {name} -->

Because there might be two edits to the exact shorthand location. It sometimes became name={name} and sometimes became na={nameme}.

I also fixed a problem when the rename is triggered in export let without type annotation or default. Rename won't update props usage. This is done in the same PR because this problem prevents the main issue from happening. Thus the added test won't fail even without the fix.

<script>
import ComponentB from './ComponentB.svelte'
export let name; // trigger here
</script>

[dummdidumm]

nice!