Move EE differences for `app/assets/javascripts/notes/stores/getters.js`

The file `` has differences between CE and EE.

Diferences

diff --git a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/notes/stores/getters.js b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/notes/stores/getters.js
index 0ffc0cb2593..52ce0ee5e5e 100644
--- a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/notes/stores/getters.js
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/notes/stores/getters.js
@@ -189,6 +189,9 @@ export const firstUnresolvedDiscussionId = (state, getters) => diffOrder => {
   return getters.unresolvedDiscussionsIdsByDate[0];
 };
 
+export const getDiscussion = state => discussionId =>
+  state.discussions.find(discussion => discussion.id === discussionId);
+
 export const commentsDisabled = state => state.commentsDisabled;
 
 // prevent babel-plugin-rewire from generating an invalid default during karma tests

What needs to be done

1. Move the getter to the CE version