Can we make the busybox images configurable?

[safderali5]

Is your feature request related to a problem? Please describe.
Busybox has a lot of vulnerablilites reported quite often. It would be better to change the busybox or use some other image without uplift k3s version.

Describe the solution you'd like
As busybox images is used to manage directories on the VM, it would be nice if there is option to replace busybox with image of your choice. Some custom image with only the desired tooling.

Another option could be to specify the busybox image version through some config option/file, so user can uplift busybox without uplifting k3s.

Additional context
Busybox also include copyleft licenses.