Conv Support for Ethernet based Spike Injection

[joyeshmishra]

• [x] Duplicate Spike Injection for Conv in spike_io_injector.cpp
• [x] Update Region Map from logical chip/core to physical chip/core
• [x] Sync with Harry - Change to Encode method to create encapsulated mesh messages
• [ ] Sync with Harry - Synchronization during spike injection to ensure time step sync

[joyeshmishra]

Verify with YoloKP