Disable autocomplete on snippets comments

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/33594

Was supposedly fixed in MR for
https://gitlab.com/gitlab-org/gitlab-ce/issues/32086 but seeing this pop
up again

app/assets/javascripts/dispatcher.js

@@ -79,7 +79,18 @@ import initSettingsPanels from './settings_panels';
       path = page.split(':');
       shortcut_handler = null;
-      new GfmAutoComplete(gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources).setup();
+      $('.js-gfm-input').each((i, el) => {
+        const gfm = new GfmAutoComplete(gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources);
+        const enableGFM = gl.utils.convertPermissionToBoolean(el.dataset.supportsAutocomplete);
+        gfm.setup($(el), {
+          emojis: true,
+          members: enableGFM,
+          issues: enableGFM,
+          milestones: enableGFM,
+          mergeRequests: enableGFM,
+          labels: enableGFM,
+        });
+      });
       function initBlob() {
         new LineHighlighter();

app/views/projects/_zen.html.haml

@@ -4,7 +4,11 @@
 .zen-backdrop
   - classes << ' js-gfm-input js-autosize markdown-area'
   - if defined?(f) && f
-    = f.text_area attr, class: classes, placeholder: placeholder, data: { supports_slash_commands: supports_slash_commands }
+    = f.text_area attr,
+      class: classes,
+      placeholder: placeholder,
+      data: { supports_slash_commands: supports_slash_commands,
+        supports_autocomplete: supports_autocomplete }
   - else
     = text_area_tag attr, current_text, class: classes, placeholder: placeholder
   %a.zen-control.zen-control-leave.js-zen-leave{ href: "#" }

app/views/projects/snippets/show.html.haml

@@ -9,4 +9,4 @@
   .row-content-block.top-block.content-component-block
     = render 'award_emoji/awards_block', awardable: @snippet, inline: true
-  #notes= render "shared/notes/notes_with_form", :autocomplete => true
+  #notes= render "shared/notes/notes_with_form", :autocomplete => false

app/views/shared/notes/_form.html.haml

@@ -27,7 +27,8 @@
       attr: :note,
       classes: 'note-textarea js-note-text',
       placeholder: "Write a comment or drag your files here...",
-      supports_slash_commands: supports_slash_commands
+      supports_slash_commands: supports_slash_commands,
+      supports_autocomplete: supports_autocomplete
     = render 'shared/notes/hints', supports_slash_commands: supports_slash_commands
     .error-alert

app/views/shared/notes/_notes_with_form.html.haml

@@ -12,7 +12,7 @@
         %a.author_link{ href: user_path(current_user) }
           = image_tag avatar_icon(current_user), alt: current_user.to_reference, class: 'avatar s40'
       .timeline-content.timeline-content-form
-        = render "shared/notes/form", view: diff_view
+        = render "shared/notes/form", view: diff_view, supports_autocomplete: autocomplete
 - elsif !current_user
   .disabled-comment.text-center.prepend-top-default
     Please