AtomicCopy copies file by reading the file then writing atomically into the target directory.

create a temp file and rename to path.

CreateK8sClientSet creates a Kubernetes clientset from a kubeconfig file.

GetKernelVersion return part of the result of 'uname -a' like '5.15.153.1-xxxx'.

KernelVersionLowerThan5_13 return whether the current kernel version is lower than 5.13, and will fallback to less BPF log ability(return true) if error.

ShouldEnroll checks whether a pod should be managed by kmesh.