PHP 8.1 + Elasticsearch 7.10 + retiring data services

• Upgrade to PHP 8.1 [API-322]
• Upgrade Elasticsearch to 7.10 [API-217]
• Retire Shop Data Service and import data directly into API [API-344]
• Retire Queues Data Service since we're not showing live wait times in any of our platforms [API-343]
• Retire catalogues data service which imports from the OSCI platform [API-345]
• Add debug endpoint that outputs Elasticsearch mapping [API-351, #47]
• Add has_advanced_imaging filter [ART-65]