[ruby/irb] Revert "Skip TypeCompletion test in ruby ci (https://github.com/ruby/irb/pull/748)" (https://github.com/ruby/irb/pull/755)
This reverts commit https://github.com/ruby/irb/commit/d394af0bbce4.
https://github.com/ruby/irb/commit/a9d0145115
[ruby/irb] Revert "Skip TypeCompletion test in ruby ci
(https://github.com/ruby/irb/pull/748)"
(https://github.com/ruby/irb/pull/755)
This reverts commit https://github.com/ruby/irb/commit/d394af0bbce4.
https://github.com/ruby/irb/commit/a9d0145115