refactor:refactor RandomString function (#524)

* refactor:refactor RandomString function

* feat:Upgrade math/rand to math/rand/v2

* Update string.go

Co-authored-by: ccoVeille <3875889+ccoVeille@users.noreply.github.com>

* feat: improve comments for RandomString function

* Update string.go

Co-authored-by: Samuel Berthe <dev@samuel-berthe.fr>

* feat:Upgrade math/rand/v2 to github.com/samber/lo/internal/rand

* Update string.go

* Update ordered_go118.go

---------

Co-authored-by: zhuhebin <zhuhebin@fengtaisec.com>
Co-authored-by: ccoVeille <3875889+ccoVeille@users.noreply.github.com>
Co-authored-by: Samuel Berthe <dev@samuel-berthe.fr>

internal/rand/ordered_go118.go

@@ -12,3 +12,15 @@ func IntN(n int) int {
 	// bearer:disable go_gosec_crypto_weak_random
 	return rand.Intn(n)
 }
+
+func Int64() int64 {
+	// bearer:disable go_gosec_crypto_weak_random
+	n := rand.Int63()
+    
+	// bearer:disable go_gosec_crypto_weak_random
+	if rand.Intn(2) == 0 {
+		return -n
+	}
+
+	return n
+}

internal/rand/ordered_go122.go

@@ -11,3 +11,7 @@ func Shuffle(n int, swap func(i, j int)) {
 func IntN(n int) int {
 	return rand.IntN(n)
 }
+
+func Int64() int64 {
+	return rand.Int64()
+}