add SAI definitions for optical circuit switch

[wni0812]

Add API definitions for Optical Circuit Switch, mainly including:

1. Creation and remove of OCS cross-connects, including both individual switching and simultaneous switching with multiple connections.
2. OCS ports operation, including the ability to set a state to any specified group of ports.
3. Retrieval of current operational status on OCS port.
4. Retrieval of hardware-specific OCS module data, such as port physical mapping information and factory insertion loss values etc.