feat: mount /sys/kernel/security into kubelet

This allows the kubelet to detect AppArmor.

Signed-off-by: Andrew Rynhard <andrew@rynhard.io>
Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>

Author: andrewrynhard

internal/app/machined/pkg/system/services/kubelet.go

@@ -120,6 +120,7 @@ func (k *Kubelet) Runner(r runtime.Runtime) (runner.Runner, error) {
 	mounts := []specs.Mount{
 		{Type: "bind", Destination: "/dev", Source: "/dev", Options: []string{"rbind", "rshared", "rw"}},
 		{Type: "sysfs", Destination: "/sys", Source: "/sys", Options: []string{"bind", "ro"}},
+		{Type: "securityfs", Destination: "/sys/kernel/security", Source: "/sys/kernel/security", Options: []string{"bind", "ro"}},
 		{Type: "bind", Destination: constants.CgroupMountPath, Source: constants.CgroupMountPath, Options: []string{"rbind", "rshared", "rw"}},
 		{Type: "bind", Destination: "/lib/modules", Source: "/lib/modules", Options: []string{"bind", "ro"}},
 		{Type: "bind", Destination: "/etc/kubernetes", Source: "/etc/kubernetes", Options: []string{"bind", "rshared", "rw"}},