Rename the rspec_flaky gem to gitlab-rspec_flaky

.gitlab/ci/gitlab-gems.gitlab-ci.yml

Gemfile

Gemfile.lock

doc/development/testing_guide/flaky_tests.md

gems/gitlab-rspec_flaky/.gitignore

gems/gitlab-rspec_flaky/.gitlab-ci.yml

gems/gitlab-rspec_flaky/.rspec

gems/gitlab-rspec_flaky/.rubocop.yml

gems/gitlab-rspec_flaky/Gemfile

gems/gitlab-rspec_flaky/Gemfile.lock

gems/gitlab-rspec_flaky/gitlab-rspec_flaky.gemspec

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky.rb

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky/config.rb

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky/example.rb

...itlab-rspec_flaky/lib/gitlab/rspec_flaky/flaky_example.rb

...flaky/lib/gitlab/rspec_flaky/flaky_examples_collection.rb

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky/listener.rb

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky/report.rb

gems/gitlab-rspec_flaky/lib/gitlab/rspec_flaky/version.rb

...gitlab-rspec_flaky/spec/gitlab/rspec_flaky/config_spec.rb