fix remove all authentication cofirmation alert

fixes: CNVS-33689

test plan:
• add some identity providers to your root account
  via accounts/self/authentication_providers
• click on 'Remove All Authentication'
• verify alert prompt:
  'Are you sure? Users may not be able to log in if this is removed.'
• added identity providers are successfully removed besides
  default canvas auth

Change-Id: Iee924f46f60a4937680a97a7aa00ec0f21fdf426
Reviewed-on: https://gerrit.instructure.com/96859
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <cody@instructure.com>
Reviewed-by: Ryan Shaw <ryan@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: August Thornton <august@instructure.com>

Author: augiethornton

app/views/account_authorization_configs/index.html.erb

@@ -18,7 +18,8 @@
 
     <% if @presenter.auth? %>
       <%= link_to(account_remove_all_authentication_providers_url(@account),
-          confirm: t(:delete_auth_confirmation, "Are you sure? Users may not be able to log in if this is removed."),
+          data: { confirm: t(:delete_auth_confirmation,
+            'Are you sure? Users may not be able to log in if this is removed.') },
           method: :delete,
           class: "delete_auth_link btn icon-trash button-sidebar-wide") do %>
           <%= t(:delete_auth_link, "Remove All Authentication") %>

spec/selenium/admin/account_admin_auth_configs_spec.rb

@@ -98,6 +98,8 @@
         expect(Account.default.authentication_providers.active.count).to eq 3
         expect_new_page_load(true) do
           f('.delete_auth_link').click
+          expect(alert_present?).to be_truthy
+          accept_alert
         end
         expect(Account.default.authentication_providers.active.count).to eq 1
         expect(Account.default.authentication_providers.count).to eq 4