Add QA selector to new modal

Updates a test made stale by a UI change.
See https://gitlab.com/gitlab-org/gitlab/-/issues/244053

app/assets/javascripts/profile/account/components/delete_account_modal.vue

@@ -63,7 +63,11 @@ Once you confirm %{deleteAccount}, it cannot be undone or recovered.`),
     primaryProps() {
       return {
         text: s__('Delete account'),
-        attributes: [{ variant: 'danger' }, { category: 'primary' }, { disabled: !this.canSubmit }],
+        attributes: [
+          { variant: 'danger', 'data-qa-selector': 'confirm_deletion_button' },
+          { category: 'primary' },
+          { disabled: !this.canSubmit },
+        ],
       };
     },
     cancelProps() {

qa/qa/page/profile/accounts/show.rb

@@ -11,17 +11,14 @@ module QA
 
           view 'app/assets/javascripts/profile/account/components/delete_account_modal.vue' do
             element :password_confirmation_field
-          end
-
-          view 'app/assets/javascripts/vue_shared/components/deprecated_modal.vue' do
-            element :save_changes_button
+            element :confirm_deletion_button
           end
 
           def delete_account(password)
             click_element(:delete_account_button)
 
             find_element(:password_confirmation_field).set password
-            click_element(:save_changes_button)
+            click_element(:confirm_deletion_button)
           end
         end
       end