Move to btn-confirm from btn-success in devise directory

changelogs/unreleased/btn-confirm-devise.yml

+---
+title: Move to btn-confirm from btn-success in devise directory
+merge_request: 58035
+author: Yogi (@yo)
+type: changed

ee/app/views/devise/sessions/_new_kerberos.html.haml

@@ -5,4 +5,4 @@
   .form-group
     = label_tag :password
     = password_field_tag :password, nil, { class: "form-control bottom", placeholder: "Password" }
-  = submit_tag "Sign in", class: "btn-success btn"
+  = submit_tag "Sign in", class: "gl-button btn btn-confirm"

ee/app/views/devise/sessions/_new_smartcard.html.haml

@@ -3,4 +3,4 @@
     .login-body
       = form_tag(auth_smartcard_url, html: { 'aria-live' => 'assertive'}) do
         .submit-container
-          = submit_tag _('Login with smartcard'), class: 'btn btn-success'
+          = submit_tag _('Login with smartcard'), class: 'gl-button btn btn-confirm'