graphics/libheif: Update to 1.17.1

• Replace libde265 with FFmpeg as HEVC decoder
• Enable JPEG and OpenJPEG 2000 support
• Disable Doxygen detection

While FFmpeg's default configuration can be a bit on the heavy side
it's also relatively easy to tailor it to fit your needs and if libheif
is needed you're likely to have other related ports depending on FFmpeg
installed. Support is relatively new so there may be bugs lurking.
Looking back libde265 has also been hit by several CVEs which is another
reason for the switch.

References:
https://www.opencve.io/cve?vendor=struktur&product=libde265

PR: 274546
Reviewed by: makc (maintainer)