ruby: update to 3.1.2

ruby: update to 3.1.2

Ruby 3.1.0 major changes:
- YJIT: New experimental in-process JIT compiler
- debug gem: A new debugger
- error_highlight: Fine-grained error location in backtrace
- IRB Autocomplete and Documentation Display
- Many more. See:
  https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released/

Ruby 3.1.1 changes:
- Many non-security bug fixes. See:
  https://www.ruby-lang.org/en/news/2022/02/18/ruby-3-1-1-released/

Ruby 3.1.2 changes:
- CVE-2022-28738: Double free in Regexp compilation
- CVE-2022-28739: Buffer overrun in String-to-Float conversion

Packaging changes:
- Dropped 100-musl.patch (upstream fix)
- Added: ruby-error_highlight, ruby-random_formatter,
  ruby-ruby2_keywords
- Removed: ruby-dbm, ruby-gdbm, ruby-fiber, ruby-gdbm, ruby-tracer
- ruby_find_pkgsdeps script:
  * cleaned some ignored and weak dependencies
- ruby_missingfiles script:
  * fix the example cmdline
  * let diff use all terminal columns

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>