x11-fonts/fontconfig: Update to 2.14.2

Upstream now supports definition of a lot of variables which means we
can now drop a bunch of local patches.

Changelog:
https://gitlab.freedesktop.org/fontconfig/fontconfig/-/blob/2.14.1/README

PR:		268627
Approved by:	desktop (tcberner)
Exp-run by: 	antoine