Enable policy type selection page by default

We now display an initial page to help the user guide through
policy selection.

Changelog: added
EE: true

config/feature_flags/development/container_security_policy_selection.yml

@@ -5,4 +5,4 @@ rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/353071
 milestone: '14.10'
 type: development
 group: group::container security
-default_enabled: false
+default_enabled: true