zlib/minizip: Update to version 1.3

Upstreams the fix from #73310, so we can remove that patch.
Remove `infback.c` which we stopped compiling after #79273.

The `OF` macro was also removed so I can drop the patch where I yell
at Gentoo developers.

thirdparty/zlib/inffast.h

@@ -8,4 +8,4 @@
    subject to change. Applications should only use zlib.h.
  */
 
-void ZLIB_INTERNAL inflate_fast OF((z_streamp strm, unsigned start));
+void ZLIB_INTERNAL inflate_fast(z_streamp strm, unsigned start);