* Why I did it
Followup to #10656. This change adds the remaining configs for the 720DT-48S platform.
* How I did it
Adds the following:
gearbox_config.json and other gearbox-related config files, to enable traffic on external PHY ports (Ethernet0-23)
sensors.conf
pcie.yaml
Also add missing facts in platform.json
* How to verify it
show interfaces status shows links up on interfaces Ethernet0-23
traffic flows with no errors on interfaces Ethernet0-23
Note: above testing depends on Add gbsyncd container for broncos #11154 and [orchagent]: Enhance initSaiPhyApi sonic-swss#2367, as well as having the appropriate PAI driver.
Co-authored-by: Samuel Angebault <staphylo@arista.com>
