std: further windows resource fix

addition to #15450
createFileW does not account for failure on `LockFile`. This can result
in a file handle not being closed on failure which can be seen on test
such as `fs.test.'open file with exclusive nonblocking lock twice'`.

lib/std/fs.zig

@@ -1397,6 +1397,7 @@ pub const Dir = struct {
             .capable_io_mode = std.io.default_mode,
             .intended_io_mode = flags.intended_io_mode,
         };
+        errdefer file.close();
         var io: w.IO_STATUS_BLOCK = undefined;
         const range_off: w.LARGE_INTEGER = 0;
         const range_len: w.LARGE_INTEGER = 1;