Previously, WiredTigerSErverStatusSection was only registered with the ServerStatus infrastructure when one of the WiredTiger-based engines was instantiated at runtime. We moved to be registered at static init time, which was incorrect for situations where we don't end up using a WT-based engine (i.e. devull). In this case we can cause crashes when the ServerStatus machinery tries to read the WT section assuming WT infra is available.