Initiate Fleet setup
[Required authorization] Route required privileges: fleet-agents-read OR fleet-agent-policies-read OR fleet-settings-read OR fleet-setup.
POST
/api/fleet/setup
curl \
--request POST 'https://localhost:5601/api/fleet/setup' \
--header "Authorization: $API_KEY" \
--header "kbn-xsrf: true"