bbatsov/rubocop

### Bug fixes

* [#12857](https://github.com/rubocop/rubocop/pull/12857): Fix false negatives for `Lint/UnreachableCode` when using pattern matching. ([@koic][])
* [#12852](https://github.com/rubocop/rubocop/issues/12852): Fix an error for `Lint/EmptyFile` in formatters when using cache. ([@earlopain][])
* [#12848](https://github.com/rubocop/rubocop/issues/12848): Fix an error that occurs in `RuboCop::Lockfile` when the constant Bundler is uninitialized. ([@koic][])

### Changes

* [#12855](https://github.com/rubocop/rubocop/pull/12855): Set custom program name for the built-in LSP server. ([@koic][])

[@koic]: https://github.com/koic
[@earlopain]: https://github.com/earlopain