Order-dependent spec failure in 11-9-stable-ee: ee/spec/features/users/login_spec.rb

As seen in 11-9-stable-ee in https://dev.gitlab.org/gitlab/gitlab-ee/-/jobs/4480142:

Failures:

  1) Login creates a security event for an invalid OAuth login
     Failure/Error:
       context.env_config.deep_dup.tap do |env|
         allow(context).to receive(:env_config).and_return(env)
       end

       #<InstanceDouble(OneLogin::RubySaml::Response) (anonymous)> was originally created in one example but has leaked into another example and can no longer be used. rspec-mocks' doubles are designed to only last for one example, and you need to create a new one in each example you wish to use it for.
     # ./spec/support/helpers/devise_helpers.rb:15:in `env_from_context'
     # ./spec/support/helpers/devise_helpers.rb:5:in `set_devise_mapping'
     # ./spec/support/helpers/login_helpers.rb:164:in `stub_omniauth_saml_config'
     # ./ee/spec/features/users/login_spec.rb:19:in `block (2 levels) in <top (required)>'

Finished in 14 minutes 30 seconds (files took 15.26 seconds to load)
1155 examples, 1 failure, 53 pending

Failed examples:

rspec ./ee/spec/features/users/login_spec.rb:18 # Login creates a security event for an invalid OAuth login

This can be reproduced via:

bundle exec rspec ee/spec/controllers/groups/omniauth_callbacks_controller_spec.rb ./ee/spec/features/users/login_spec.rb