Add funcs in pkg/filesystem/util that can actually set file permissiosn

on Windows and update container log dir perms to 660 on Windows

pkg/util/filesystem/util_unix.go

@@ -37,6 +37,16 @@ func IsUnixDomainSocket(filePath string) (bool, error) {
 	return true, nil
 }
 
+// Chmod is the same as os.Chmod on Unix.
+func Chmod(name string, mode os.FileMode) error {
+	return os.Chmod(name, mode)
+}
+
+// MkdirAll is same as os.MkdirAll on Unix.
+func MkdirAll(path string, perm os.FileMode) error {
+	return os.MkdirAll(path, perm)
+}
+
 // IsAbs is same as filepath.IsAbs on Unix.
 func IsAbs(path string) bool {
 	return filepath.IsAbs(path)