The GPU backend selection menu, used to select the Vulkan backend, was
hidden behind the Developer Extras user interface option in 4.3 as
Vulkan wasn't ready for wide spread testing due to multiple
major issues.
The majority of the major issues have been fixed, and Vulkan should
safer to use.
To help encourage Vulkan testing throughout Blender 4.4's development,
this commit unhides the Vulkan backend from behind the developer extras
option.
Pull Request: https://projects.blender.org/blender/blender/pulls/131231
fe30aee7e7