[Fix #10859] Fix Lint/Debugger to be able to handle method chains correctly

[dvandersluis]

Lint/Debugger was not handling method chains properly, so this fixes it. It also removes the implicit Kernel prefix and makes it explicit in the configuration (it wasn't working as expected anyways).

Fixes #10859.

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• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
• Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.

[Ivanov-Anton]

tried all is working properly ✅

[koic]

Thanks!