detect binding.irb in ensure_no_debug_code during build.

[mataku]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I see several green ci/circleci builds in the "All checks have passed" section of my PR (connect CircleCI to GitHub if not)
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.
• I've added or updated relevant unit tests.

Motivation and Context

Since binding.irb is a debugging tool available by default in Ruby supported by the current fastlane, we can use the REPL environment easily by writing binding.irb without the need for gem 'irb' etc.

Therefore, how about adding binding.irb as a target for debugging code checks if you want to ensure that no debugging codes?

Description

Add binding.irb by ensure_no_debug_code action

Testing Steps

bundle exec fastlane test

[lacostej]

makes sense to me.

[lacostej]

Merged. Thanks!