feat: Implement Lchown function for changing file ownership (#5161)

* feat: Implement Lchown function for changing file ownership

- Added Lchown function to change the numeric uid and gid of a file or symbolic link.
- Included error handling to return *PathError for failed operations.
- Added unit tests for Lchown to verify behavior on different error scenarios.

* fix: fix chmod tests

src/syscall/syscall_libc.go

@@ -172,6 +172,15 @@ func Chown(path string, uid, gid int) (err error) {
 	return
 }
 
+func Lchown(path string, uid, gid int) (err error) {
+	data := cstring(path)
+	fail := int(libc_lchown(&data[0], uid, gid))
+	if fail < 0 {
+		err = getErrno()
+	}
+	return
+}
+
 func Fork() (err error) {
 	fail := int(libc_fork())
 	if fail < 0 {
@@ -368,6 +377,11 @@ func libc_chmod(pathname *byte, mode uint32) int32
 //export chown
 func libc_chown(pathname *byte, owner, group int) int32
 
+// int lchown(const char *pathname, uid_t owner, gid_t group);
+//
+//export lchown
+func libc_lchown(pathname *byte, owner, group int) int32
+
 // int mkdir(const char *pathname, mode_t mode);
 //
 //export mkdir