bbatsov/rubocop

### Bug fixes

* [#8684](https://github.com/rubocop/rubocop/issues/8684): Fix an error for `Lint/InterpolationCheck` cop. ([@tejasbubane][])
* [#9145](https://github.com/rubocop/rubocop/issues/9145): Fix issues with SuggestExtensions when bundler is not available, or when there is no gemfile. ([@dvandersluis][])
* [#9140](https://github.com/rubocop/rubocop/issues/9140): Fix an error for `Layout/EmptyLinesAroundArguments` when multiline style argument for method call without selector. ([@koic][])
* [#9136](https://github.com/rubocop/rubocop/pull/9136): Fix `AllowedIdentifiers` in `Naming/VariableNumber` to include variable assignments. ([@PhilCoggins][])

[@tejasbubane]: https://github.com/tejasbubane
[@dvandersluis]: https://github.com/dvandersluis
[@koic]: https://github.com/koic
[@PhilCoggins]: https://github.com/PhilCoggins