cups: update to 2.3.3op2

Apple are no longer maintaining CUPS, and future development is now
happening under the OpenPrinting project:

https://ftp.pwg.org/pub/pwg/liaison/openprinting/presentations/cups-plenary-may-2021.pdf



Also stop disabling the manpage installation as manpages are useful, and
remove some patch chunks that are not required.

The CVE-2020-10001 patch is dropped as this is incorporated into 2.3.3op2.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>