What about extract hashName to a separate package

[Okabe-Rintarou-0]

Please provide an in-depth description of the question you have:
Now hashName is in workload controller:

kmesh/pkg/controller/workload/workload_hash.go

Lines 36 to 56 in 167a806

	// HashName converts a string to a uint32 integer as the key of bpf map
	type HashName struct {
	numToStr map[uint32]string
	strToNum map[string]uint32
	}
	func NewHashName() *HashName {
	hashName := &HashName{
	strToNum: make(map[string]uint32),
	}
	// if read failed, initialize with an empty map
	if err := hashName.readFromPersistFile(); err != nil {
	hashName.numToStr = make(map[uint32]string)
	} else {
	hashName.numToStr = make(map[uint32]string, len(hashName.strToNum))
	for str, num := range hashName.strToNum {
	hashName.numToStr[num] = str
	}
	}
	return hashName
	}

In my pr for circuitbreaker #570 , I may need to map cluster name to cluster id to meet the requirement of ebpf stack size limit.

What do you think about this question?:

Environment:

• Kmesh version:
• Others:

[YaoZengzeng]

Maybe put into pkg/utils is great :)