Fix addition of `enabled` in securityContext for Anchore DB jobs

(I actually tested this one I promise)

To replicate testing run helm template chart --set postgresql.enabled=false --set postgresql.externalEndpoint=test --set anchore-feeds-db.enabled=false --set anchore-feeds-db.externalEndpoint=test --set anchoreEnterpriseGlobal.enabled=true --debug | less and validate that the securityContext on ensure-anchore-db and ensure-feeds-db jobs looks good.