In the previous ticket SERVER-100224, we resolved an issue where feature_compatibility_version.idl was incorrectly linked to mongos, allowing mongos to respond to the FCV getParameter command with the current binary version:

db.adminCommand({ getParameter: 1, featureCompatibilityVersion: 1 })

This ticket aims to address a recurrence of that issue by removing the implicit linking of feature_compatibility_version.idl from mongos and ensuring that this incorrect library injection cannot happen again.