Add endpoint to remove "remember my choice" cookie

[baszoetekouw]

In #1956 we describe a feature where a user can specify per SP which IdP they want to use. On a next login to that SP, the preferred IdP will be used automatically without user interaction.

This ticket describes an endpoint that allows users to reset these choices.

• Add a global configuration option wayf.reset_choice_per_idp_redirect to parameters.yml that contains a url to redirect the user to after resetting the choice (see below)

• Implement a front-end page/endpoint as follows:

  • It is located at https://engineblock.dev.openconext.org/reset-remember-wayf
  • When the user visits this page, check if they send a cookie rememberedidps and if so, remove it.
  • Log a message with level INFO and message "WAYF-remember-my-choice cookie removed (had <number> entries)"
  • After removing the cookie, redirect the user (302) to the url set in wayf.reset_choice_per_idp_redirect

[pmeulen]

• engine does a redirect. No UI in engine. return status as get parameter in the redirect.
• UI in Profile. @baszoetekouw UI design in Profile.
• Redirect URL in engine and profile config

[baszoetekouw]

Return state to profile either one of:

• cookies have been remove
• there were no cookies