Add a check if OID exists before setting Host Tx Ready Signal Enable #3233
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This is a cherry-pick of #3232
What I did
I added a query before setting host tx ready - must check that Oid exists before setting attribute to SAI.
Why I did it
When we do dynamic port breakout to a Fw-control port, portsorch receives a notification that something was deleted in TRANSCEIVER_INFO table from State DB, and tries to set HOST_TX_READY_SIGNAL_ENABLE attribute to false for the deleted OID.
The issue is the Oid is already deleted and we receive an error from SAI.
How I verified it
Run DPB on the switch
Details if related