feat: update users on SAML setup and destroy [CW-2958][CW-5612] (#12346)

enterprise/app/builders/saml_user_builder.rb

@@ -17,6 +17,7 @@ class SamlUserBuilder
     user = User.from_email(auth_attribute('email'))
 
     if user
+      confirm_user_if_required(user)
       convert_existing_user_to_saml(user)
       return user
     end
@@ -24,6 +25,13 @@ class SamlUserBuilder
     create_user
   end
 
+  def confirm_user_if_required(user)
+    return if user.confirmed?
+
+    user.skip_confirmation!
+    user.save!
+  end
+
   def convert_existing_user_to_saml(user)
     return if user.provider == 'saml'