[Release-1.29] - missing kernel config check

[brandond]

Backport fix for missing kernel config check

• missing kernel config check #10099

[mdrahman-suse]

Validated on release-1.29 branch with commit 12864fb

Testing

Followed same steps as mentioned here: #10099 (comment)

Validation

$ k3s -v
k3s version v1.29.5+k3s-12864fb6 (12864fb6)
go version go1.21.9

$ sudo k3s check-config

Verifying binaries in /var/lib/rancher/k3s/data/67b84b94eeeda77d0cc23bedf78a90f4b5754238adc05955149b7786510aa04b/bin:
- sha256sum: good
- links: good

System:
- /usr/sbin iptables v1.8.7 (nf_tables): ok
- swap: disabled
- routes: ok

Limits:
- /proc/sys/kernel/keys/root_maxkeys: 1000000

modprobe: FATAL: Module configs not found in directory /lib/modules/6.2.0-1012-aws
info: reading kernel config from /boot/config-6.2.0-1012-aws ...

Generally Necessary:
- cgroup hierarchy: cgroups V2 mounted, cpu|cpuset|memory controllers status: good
- /usr/sbin/apparmor_parser
apparmor: enabled and tools installed
- CONFIG_NAMESPACES: enabled
- CONFIG_NET_NS: enabled
- CONFIG_PID_NS: enabled
- CONFIG_IPC_NS: enabled
- CONFIG_UTS_NS: enabled
- CONFIG_CGROUPS: enabled
- CONFIG_CGROUP_PIDS: enabled
- CONFIG_CGROUP_CPUACCT: enabled
- CONFIG_CGROUP_DEVICE: enabled
- CONFIG_CGROUP_FREEZER: enabled
- CONFIG_CGROUP_SCHED: enabled
- CONFIG_CPUSETS: enabled
- CONFIG_MEMCG: enabled
- CONFIG_KEYS: enabled
- CONFIG_VETH: enabled (as module)
- CONFIG_BRIDGE: enabled (as module)
- CONFIG_BRIDGE_NETFILTER: enabled (as module)
- CONFIG_IP_NF_FILTER: enabled (as module)
- CONFIG_IP_NF_TARGET_MASQUERADE: enabled (as module)
- CONFIG_IP_NF_TARGET_REJECT: enabled (as module)
- CONFIG_NETFILTER_XT_MATCH_ADDRTYPE: enabled (as module)
- CONFIG_NETFILTER_XT_MATCH_CONNTRACK: enabled (as module)
- CONFIG_NETFILTER_XT_MATCH_IPVS: enabled (as module)
- CONFIG_NETFILTER_XT_MATCH_COMMENT: enabled (as module)
- CONFIG_NETFILTER_XT_MATCH_MULTIPORT: enabled (as module)
- CONFIG_IP_NF_NAT: enabled (as module)
- CONFIG_NF_NAT: enabled (as module)
- CONFIG_POSIX_MQUEUE: enabled
...
STATUS: pass