Improve records list tests

- Remove scaffolded tests (precursor to removing functionality)
- Add tests for paginated list

lib/music_library_web/components/pagination.ex

@@ -11,7 +11,10 @@ defmodule MusicLibraryWeb.Pagination do
     assigns = assign(assigns, :page_links, page_links)
 
     ~H"""
-    <div class="flex items-center justify-between border-t border-gray-200 bg-white px-4 py-3 sm:px-6">
+    <div
+      id="pagination"
+      class="flex items-center justify-between border-t border-gray-200 bg-white px-4 py-3 sm:px-6"
+    >
       <%!-- Only on smallest viewport --%>
       <div class="flex flex-1 justify-between sm:hidden">
         <a