Invocation of synthetic and vSwarm function in same run

[aryans1204]

Currently, the Invoker client for the Loader is resolved at the Configuration level, which means the same Invoker client and RPC format is used for all the functions invoked during the experiment run. However, the mapper emits both vSwarm and synthetic functions, and therefore the Loader is unable to invoke the synthetic functions while using the mapper output functions due to incompatible RPC format.