Why I did it
To support dynamic swapping of module types/speeds (400G/100G/40G)
To optimize CMIS ZR optics operation
How I did it
Reinitialize xcvr_api at module removal/insertion time, and also optimize cache for ZR optics.
How to verify it
Verify that different (supported) module types can be dynamically swapped (removed/inserted) and that each is properly provisioned by Xcvrd and has its EEPROM information accurately reported in Redis DB (using "show transceiver eeprom") as well as "sfputil show eeprom" direct access.
Also verify that Xcvrd initialization and operation with 400G CMIS ZR optics is both efficient and functional.
** edit 6/14/23: pushed enhanced caching (full memory map) support and elimination of base class APIs override.
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