Add specs for both SharedState and Sessions store

...groups/dependency_proxy_for_containers_controller_spec.rb

ee/spec/features/users/login_spec.rb

ee/spec/lib/gitlab/auth/group_saml/session_enforcer_spec.rb

ee/spec/lib/gitlab/auth/otp/session_enforcer_spec.rb

ee/spec/lib/gitlab/auth/smartcard/session_enforcer_spec.rb

ee/spec/lib/gitlab/auth/smartcard/session_spec.rb

ee/spec/lib/gitlab/git_access_spec.rb

ee/spec/requests/api/internal/base_spec.rb

ee/spec/requests/repositories/git_http_controller_spec.rb

spec/channels/application_cable/connection_spec.rb

spec/features/users/active_sessions_spec.rb

spec/features/users/anonymous_sessions_spec.rb

spec/features/users/login_spec.rb

spec/initializers/session_store_spec.rb

spec/lib/gitlab/anonymous_session_spec.rb

spec/lib/gitlab/redis/sessions_spec.rb

spec/models/active_session_spec.rb

spec/requests/api/commits_spec.rb

spec/support/helpers/session_helpers.rb

spec/support/redis/redis_shared_examples.rb