This HiveFederatedCatalogFactory module is an independent compilation unit and will be built into the Polaris binary only when the following flag is set in the gradle.properties file:
NonRESTCatalogs=HIVE,<alternates>
The other option is to pass it as an argument to the gradle JVM as follows:
./gradlew build -PNonRESTCatalogs=HIVE
Without this flag, the Hive factory won't be compiled into Polaris and therefore Polaris will not load the class at runtime, throwing an unsupported exception for federated catalog calls.