Download secret-store-feature-pack-resources JAR file with all dependencies

This Maven module exists solely because wildfly-server-provisioning-maven-plugin is able to load the subsystem fragments (see src/main/resources/subsystem-templates/*) only from jars that are pulled by some WildFly module. Projects that have WildFly modules usually pack this kind of resources inside one of the modules' jars. Although we do not need a WildFly module to run any code, we need to have one just for the sake of loading the subsystem-templates by wildfly-server-provisioning-maven-plugin.