refactor: dedicated icon for permanently delete (#10052)

Motivation
----------
It's a follow up to #10028. I think it would be better user experience if one can tell by the icon what the delete button is about to do.

I hope I caught all the occurences where one can permanently delete assets.

How to test
-----------
1. Visit e.g. `/trash`
2. If you select some assets, the delete button in the top right corner
   looks different.

web/src/routes/(user)/trash/[[photos=photos]]/[[assetId=id]]/+page.svelte

@@ -20,7 +20,7 @@
   import { featureFlags, serverConfig } from '$lib/stores/server-config.store';
   import { handleError } from '$lib/utils/handle-error';
   import { emptyTrash, restoreTrash } from '@immich/sdk';
-  import { mdiDeleteOutline, mdiHistory } from '@mdi/js';
+  import { mdiDeleteForeverOutline, mdiHistory } from '@mdi/js';
   import type { PageData } from './$types';
   import { handlePromiseError } from '$lib/utils';
   import { dialogController } from '$lib/components/shared-components/dialog/dialog';
@@ -106,7 +106,7 @@
       </LinkButton>
       <LinkButton on:click={() => handleEmptyTrash()} disabled={$isMultiSelectState}>
         <div class="flex place-items-center gap-2 text-sm">
-          <Icon path={mdiDeleteOutline} size="18" />
+          <Icon path={mdiDeleteForeverOutline} size="18" />
           Empty trash
         </div>
       </LinkButton>