[Fix #10016] Fix conflict between Style/SoleNestedConditional and Style/NegatedIf or Style/NegatedUnless

[dvandersluis]

When both Style/SoleNestedConditional and one of Style/NegatedIf or Style/NegatedUnless detect offenses on the same nested if, both corrections are applied, which results in the second clause of the resulting conditional to be inverted.

Fixes #10016.

---

Before submitting the PR make sure the following are checked:

• 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.