Crowdsec Nethesis support IP allowlist

[DavidePrincipi]

During a support session Nethesis IP addresses must be allowed to connect with the cluster node.

We can hardcode them in default Crowdsec configuration, or dynamically add/remove them when the support session is started.

Discussion https://mattermost.nethesis.it/nethesis/pl/fjnqqbg6e7yjj89seejpa4ac7w

[DavidePrincipi]

v1.6.6 introduces centralized allowlists

https://github.com/crowdsecurity/crowdsec/releases/tag/v1.6.6

[stephdl]

see https://docs.crowdsec.net/docs/next/local_api/centralized_allowlists/

and https://github.com/crowdsecurity/crowdsec/releases

[stephdl]

QA (see also #7424)

target version : ghcr.io/nethserver/crowdsec:1.0.14-dev.2

• case 1 direct install
  add and remove a subscription key, you must see in the allowlists the IP 159.65.203.xxx if the subscription is enabled, the IP is removed without subscription key
  runagent -m crowdsec1 cscli allowlists inspect nethserver_whitelist

• case 2 upgrade from 1.0.13 to 1.0.14-dev.2
  add and remove a subscription key, you must see in the allowlists the IP 159.65.203.xxx if the subscription is enabled, the IP is removed without subscription key
  runagent -m crowdsec1 cscli allowlists inspect nethserver_whitelist