databases/rubygem-red-plasma: Remove obsoleted port

red-plasma is deprecated since 10.0.0. red-plasma will not be released from
Apache Arrow 12.0.0 or so.

audio/opus: bump consumers after update to 1.4

*: Bump PORTREVISIONs for math/mpc update to 1.3.1

Mk/**ruby.mk: Switch from USE_RUBY=yes to USES=ruby

Switch from Mk/bsd.ruby.mk to Mk/Uses/ruby.mk

Notable changes are.

- Mk/bsd.ruby.mk is moved to Mk/Uses/ruby.mk.
- USE_RUBY=yes is replaced with USES=ruby.
- USE_RUBY_EXTCONF is replaced with USES=ruby:extconf.
- USE_RUBY_RDOC is replaced with USES=ruby:rdoc.
- USE_RUBY_SETUP is replaces with USES=ruby:setup.
- RUBY_NO_BUILD_DEPENDS and RUBY_NO_RUN_DEPENDS are replaced with
  USES=ruby:{build,none,run}.
- RUBY_REQUIRE isn't used anywhere, so removed.
- USES=gem now implies USES=ruby.

This is mainly the work of yasu@ at https://reviews.freebsd.org/D27863

I have just made some cosmetic changes and ran exp-run to test that the
tree is not in a BROKEN state.

Approved by:	portmgr
Differential Revision:	https://reviews.freebsd.org/D37925

databases/rubygem-red-plasma: Add rubygem-red-plasma 8.0.0

Red Plasma is the Ruby bindings of Plasma. Red Plasma is based on GObject
Introspection.

Plasma is an in-memory object store and cache for big data.

GObject Introspection is a middleware for language bindings of C library.
GObject Introspection can generate language bindings automatically at runtime.

Red Plasma uses Plasma GLib and gobject-introspection gem to generate Ruby
bindings of Plasma.

See also: https://github.com/apache/arrow/tree/master/ruby/red-plasma