Link to the Identity provider's account settings from the account settings (#24100)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/controllers/application_controller.rb

@@ -16,6 +16,8 @@ class ApplicationController < ActionController::Base
   helper_method :current_theme
   helper_method :single_user_mode?
   helper_method :use_seamless_external_login?
+  helper_method :omniauth_only?
+  helper_method :sso_account_settings
   helper_method :whitelist_mode?
 
   rescue_from ActionController::ParameterMissing, Paperclip::AdapterRegistry::NoHandlerError, with: :bad_request
@@ -118,6 +120,14 @@ class ApplicationController < ActionController::Base
     Devise.pam_authentication || Devise.ldap_authentication
   end
 
+  def omniauth_only?
+    ENV['OMNIAUTH_ONLY'] == 'true'
+  end
+
+  def sso_account_settings
+    ENV.fetch('SSO_ACCOUNT_SETTINGS')
+  end
+
   def current_account
     return @current_account if defined?(@current_account)