Add the "Requestor::squad" at C4 level labels

Add the following labels at C4 level to facilitate dependencies management and PI preparation.

Requestor::Cert

Requestor::Cloud

Requestor::CMDB

Requestor::Compliance

Requestor::DEV

Requestor::EUIX

Requestor::Firewall

Requestor::LB/DNS/Proxy

Requestor::PaaS

Requestor::RAS

Requestor::RPS

Requestor::Supporting Services

Requestor::TC/DC

Requestor::Wifi/Workplace

Requestor::UCX