Registers an AIAPIKeys subclass above existing priorities that returns a placeholder key for
allowedDriverClasses (all of which have fake drivers registered) and undefined for every
other driver class so GetAIAPIKeyGlobal never falls back to .env vendor keys.
Registers an
AIAPIKeyssubclass above existing priorities that returns a placeholder key forallowedDriverClasses(all of which have fake drivers registered) andundefinedfor every other driver class soGetAIAPIKeyGlobalnever falls back to.envvendor keys.