Wires crowdsec/gateway-public-securitypolicy.yaml into the kustomization now
that LAPI, AppSec and the bouncer are all healthy and the envoy bouncer is
registered with LAPI.
Covers every listener on gateway-public rather than just one app, since EG
v1.3.2 rejects targetRefs.sectionName on SecurityPolicy. gateway-internal is a
separate Gateway and is untouched, so LAN access is unaffected. failOpen is
true, so a bouncer outage lets traffic through instead of denying it.