Initial commit for Gainward RTX 3090 Phoenix

I just added the GPU to the detection for Gainward v2 protocol after making sure it worked on my machine (Windows 10).

Checklist for Accepting a Merge Request for a New Device

The New Device issue raised for this device is linked to this MR with a keyword Closes / Resolves / Implements
There is a device protocol page in the Developer Wiki or there is enough information / captures in the New Device issue to provide ongoing support.
The code to be merged follows the style guide and change requirements as documented in the contributing guide.

Meta data for the device is included in RGBController_* file
This device is detected and is working on Windows 10 and / or 11
This device is detected and is working on Linux (Please specify distribution and releases tested)
Logging for Info, Warnings and Errors has been added for troubleshooting purposes

There were no open issues
Using an already known protocol
I don't really know what metadata you're talking about, but I don't think I have to add anything there
Would test on linux if necessary.
No Additional logging necessary