[Arista]Add media_settings.json for x86_64-arista_7800r3a_36d2_lc (#12444)

Why I did it
TX FIR tuning should be done based on the type of inserted transceiver

How I did it
Add media_settings.json which contains the tuning data for 100G optic and 400G optic.

How to verify it
Tested against x86_64-arista_7800r3a_36d2_lc
This commit is contained in:
Bohan Yang 2022-11-21 14:50:34 -08:00 committed by Ying Xie
parent db09bef671
commit 18bdd154a6

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