Move gearbox signal integrity settings to media_settings.json#2

bgallagher-nexthop wants to merge 3 commits intomasternexthop-ai/sonic-buildimage:masterfrom

bgallagher.consolidate-gearbox-si-settingsnexthop-ai/sonic-buildimage:bgallagher.consolidate-gearbox-si-settingsCopy head branch name to clipboard