Added Gigabyte RTX 4070 Gaming OC 12GB V2 GPU

* Added `0x412B` to pci_ids.h
* Registered detector in GigabyteRGBFusion2GPUControllerDetect.cpp
* Link to [webpage](https://www.gigabyte.com/Graphics-Card/GV-N4070GAMING-OCV2-12GD#kf)
* Resolves #4197
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f