chore(bindgen): upgrade to linux 6.12 headers and use single kernel tree#5352

Manciukic merged 9 commits intofirecracker-microvm:mainfirecracker-microvm/firecracker:mainfrom

Manciukic:bindgen/use-linux-6.12Manciukic/firecracker:bindgen/use-linux-6.12Copy head branch name to clipboard