chore: fix various problems (#39298)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

modules/util/string.go

@@ -4,6 +4,7 @@
 package util
 
 import (
+	"iter"
 	"strings"
 	"unsafe"
 )
@@ -131,3 +132,10 @@ func AsciiEqualFold(s, t string) bool {
 	}
 	return true
 }
+
+func StringSplitSeq[T, S ~string](s T, sep S) iter.Seq[T] {
+	f := strings.SplitSeq(string(s), string(sep))
+	return func(yield func(T) bool) {
+		f(func(v string) bool { return yield(T(v)) })
+	}
+}