Regex fix for custom kernel naming

[Shivkumar13]

Current regex implementation in the _resolve_kernel_version() fails to work with custom kernels like 6.11.0-01075-gc758b3587a28

This PR Fixes the hard requirement for numeric component for the build number in the Custom Linux Kernel naming convention.
Ubuntu GPU driver containers only.

root@ubuntu:~# k logs -n nvidia-gpu-operator nvidia-driver-daemonset-kr8vj -c nvidia-driver-ctr -f
DRIVER_ARCH is aarch64

========== NVIDIA Software Installer ==========

Starting installation of NVIDIA driver version 575.57.08 for Linux kernel version 6.11.0-01075-gc758b3587a28

Unloading NVIDIA driver kernel modules...
Unmounting NVIDIA driver rootfs...
Updating the package cache...
Resolving Linux kernel version...
Unloading NVIDIA driver kernel modules...
Could not resolve Linux kernel version
Unmounting NVIDIA driver rootfs…

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