ADd deprecation warning for group import/export

Changelog: added

app/views/groups/_import_group_from_file_panel.html.haml

@@ -6,9 +6,17 @@
   .gl-border-l-solid.gl-border-r-solid.gl-border-gray-100.gl-border-1.gl-p-5
     %h4
       = _('Import group from file')
-    %p
-      = s_('GroupsNew|Provide credentials for another instance of GitLab to import your groups directly.')
-    .form-group.gl-display-flex.gl-flex-direction-column
+    .gl-alert.gl-alert-warning{ role: 'alert' }
+      = sprite_icon('warning', css_class: 'gl-icon s16 gl-alert-icon gl-alert-icon-no-title')
+      .gl-alert-body
+        - docs_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: help_page_path('user/group/import/index.md') }
+        - link_end = '</a>'.html_safe
+        = s_('GroupsNew|This feature is deprecated and replaced by %{docs_link_start}Group Migration%{docs_link_end}.').html_safe % { docs_link_start: docs_link_start, docs_link_end: link_end }
+        - if Feature.enabled?(:bulk_import, default_enabled: :yaml)
+          - enable_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: help_page_path('user/group/import/index.md', anchor: 'enable-or-disable-gitlab-group-migration') }
+          = s_('GroupsNew|Ask your administrator to %{enable_link_start}enable%{enable_link_end} Group Migration.').html_safe % { enable_link_start: enable_link_start, enable_link_end: link_end }
+
+    .form-group.gl-display-flex.gl-flex-direction-column.gl-mt-5
       = f.label :name, _('New group name'), for: 'import_group_name'
       = f.text_field :name, placeholder: s_('GroupsNew|My Awesome Group'), class: 'js-autofill-group-name gl-form-input col-xs-12 col-sm-8',
         required: true,

app/views/groups/settings/_export.html.haml

@@ -5,6 +5,12 @@
 .sub-section
   %h4= s_('GroupSettings|Export group')
   %p= _('Export this group with all related data.')
+  .gl-alert.gl-alert-warning.gl-mb-4{ role: 'alert' }
+    = sprite_icon('warning', css_class: 'gl-icon s16 gl-alert-icon gl-alert-icon-no-title')
+    .gl-alert-body
+      - docs_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: help_page_path('user/group/import/index.md') }
+      - docs_link_end = '</a>'.html_safe
+      = s_('GroupsNew|This feature is deprecated and replaced by %{docs_link_start}Group Migration%{docs_link_end}.').html_safe % { docs_link_start: docs_link_start, docs_link_end: docs_link_end }
   %p
     - export_information = _('After the export is complete, download the data file from a notification email or from this page. You can then import the data file from the %{strong_text_start}Create new group%{strong_text_end} page of another GitLab instance.') % { strong_text_start: '<strong>'.html_safe, strong_text_end: '</strong>'.html_safe}
     = export_information.html_safe

locale/gitlab.pot

@@ -17103,6 +17103,9 @@ msgstr ""
 msgid "GroupsNew|%{linkStart}Groups%{linkEnd} allow you to manage and collaborate across multiple projects. Members of a group have access to all of its projects."
 msgstr ""
 
+msgid "GroupsNew|Ask your administrator to %{enable_link_start}enable%{enable_link_end} Group Migration."
+msgstr ""
+
 msgid "GroupsNew|Assemble related projects together and grant members access to several projects at once."
 msgstr ""
 
@@ -17157,6 +17160,9 @@ msgstr ""
 msgid "GroupsNew|Provide credentials for another instance of GitLab to import your groups directly."
 msgstr ""
 
+msgid "GroupsNew|This feature is deprecated and replaced by %{docs_link_start}Group Migration%{docs_link_end}."
+msgstr ""
+
 msgid "GroupsNew|To import a group, navigate to the group settings for the GitLab source instance, %{link_start}generate an export file%{link_end}, and upload it here."
 msgstr ""