all: drop support for EOL FreeBSD 12.2

• Mk/bsd.port.mk: bump minimal FreeBSD version to 12.3, update an example
• sysutils/lsof: drop support for ancient FreeBSD releases.
• multimedia/ustreamer: remove inline patch for 12.2
• x11/wayland-logout: remove support for FreeBSD < 12.3
• sysutils/bhyve+: remove support for FreeBSD 12.2
• databases/clickhouse: remove support for FreeBSD 12.2
• databases/mariadb106-server: remove support for FreeBSD 12.2
• devel/cvsd: no need to test for FreeBSD >=5 anymore
• devel/imake: no need to support a.out anymore
• japanese/kterm: no need to support FreeBSD <= 9
• math/igraph: remove support for FreeBSD 12.2
• net/onedrive: remove support for FreeBSD 12.2
• security/ipsec-tools: no need to test for FreeBSD >= 11
• emulators/rpcs3: Revert "emulators/rpcs3: unbreak on FreeBSD 12.2 after 49f593b2f77f"

Reviewed by: brnrd, fluffy, jbeich, ler, yuri, x11 (zeising)
Approved by: portmgr (implicit)
Differential Revision: https://reviews.freebsd.org/D34523