Use _chsize_s on windows to grow file

Looks like "seek after file end and write" doesn't work
correctly in Windows. We have to grow file before.

Met occasionally on GitHub actions run. Could not reproduce
locally.

src/utils/file.c

@@ -2717,6 +2717,14 @@ fio_send_file_write(FILE* out, send_file_state* st, char *buf, size_t len)
 	if (len == 0)
 		return true;
 
+#ifdef WIN32
+	if (st->read_size > st->write_size &&
+		_chsize_s(fileno(out), st->read_size) != 0)
+	{
+		elog(WARNING, "Could not change file size to %lld: %m", st->read_size);
+		return false;
+	}
+#endif
 	if (st->read_size > st->write_size &&
 		fseeko(out, st->read_size, SEEK_SET) != 0)
 	{