Fix autocorrection for Rails/IndexBy and Rails/IndexWith when map { ... }.to_h is enclosed in another block

[eugeneius]

Related to #1315.

While working on #1405, I noticed another fix applied to Style/HashTransform{Keys,Values} that also affects Rails/Index{By,With} (rubocop/rubocop#10171).

---

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.
• If this is a new cop, consider making a corresponding update to the Rails Style Guide.

[koic]

Nice 👍