Create cluster description for simulation device

[tt-vjovanovic]

Currently, we have mechanism to to detect cluster description with tt_ClusterDescriptor::get_cluster_descriptor_file_path() for devices that are attached to host. We also have tt_ClusterDescriptor::create_mock_cluster function that creates mock version for specified device ids and architecture.

Minimum what we should have is function that will create cluster descriptor for simulation device based on simulator directory.

Since we will have function for "real" devices connected to host and also function for simulaton device, not sure if it makes sence to have static methods in tt::umd::Cluster and tt_SimulationDevice that would be logically associated with those functions...