Replace byebug and pry

Replace byebug and pry

- Replace byebug with ruby/debug
- Replaces pry with irb

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6955

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6956

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Changelog: other

What does this MR do?

Replaces byebug gem (a debugger for Ruby 2) with debug gem (also known as ruby/debug) (default debugger for Ruby 3). Also replaces pry gem with irb gem, the default gem in Ruby 3.0 or higher.

Note 1: pry was introduced in !3217 (merged), but no reference there.

Note 2: pry is still depended from inspec-core, which is not easy to remove it at all.

Related issues

Closes #6956 (closed)

Also closes #6955 (closed)

Checklist

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• Merge Request Title, and Description are up to date, accurate, and descriptive
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Expected (please provide an explanation if not completing)

• [n/a] Test plan indicating conditions for success has been posted and passes
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