Initial commit for Gigabyte RTX3080Ti Eagle OC 12G

* Added ID to pci_ids.h
* Registering detector in GigabyteRGBFusionGPUControllerDetect.cpp
* Link to [webpage](https://www.gigabyte.com/au/Graphics-Card/GV-N308TEAGLE-OC-12GD/sp#sp)
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