This has to be done in one commit to avoid breaking INDEX

Changes:	https://docs.python.org/release/3.8.20/whatsnew/changelog.html

The mpdecimal update changes the soname; bump dependent ports.

PR:		276444

* Python 3.8 will reach its End-of-Life on 2024-10. Set the expiration
  date accordingly.

Approved by:	lwhsu (python, maintainer)
Differential Revision:	https://reviews.freebsd.org/D43345

Approved by:    portmgr (blanket)

- Remove all references to defunct ARCH arm
- Remove all references to defunct ARCH sparc64
- Remove x11-drivers/xf86-video-sunffb which requires defunct sparc64
  ARCH
- Remove sysutils/afbinit requires defunct sparc64 ARCH
- Remove all references to bktr driver
- Remove all references to defunct FreeBSD_12
- Remove all references to OSVERSION/OSREL corresponding to 12
- Remove conditionals in Mk/Uses/cabal.mk
- Remove sparc reference from Mk/Uses/qt-dist.mk
- Remove BROKEN_sparc64/NOT_FOR_ARCH=sparc64
- Remove BROKEN_FreeBSD_12* from:
- Remove OpenSSL patches from:
- Remove conditional flags for OSVERSION >= 1300000 to fixed flags.
  Also move conditional flags for non sparc64/arm ARCH to fixed flags.

Reviewed by:	brooks, jbeich, rene, salvadore
Differential Revision: https://reviews.freebsd.org/D42068

- Remove XY: Replace .cpython-%%XY%% with %%PYTHON_EXT_SUFFIX%%
- Remove XYDOT:
  - Replace lib/python%%XYDOT%% with %%PYTHON_LIBDIR%%
  - Replace %%XYDOT%% with %%PYTHON_VER%%
- Rename XYZDOT to DISTVERSION