CodeQL Ruby parser fails on bare & block forwarding in multi-line method calls

# 🖼️ Context

CodeQL's Ruby parser encounters parse errors when using Ruby 3.1+'s anonymous block forwarding syntax (&) in specific contexts, despite this being valid Ruby syntax.

## Reproduction Case

```ruby
module TestCase
def method_with_bare_ampersand(&)
some_method_call(
keyword_arg1: "value1",
keyword_arg2: "value2",
keyword_arg3: "value3",
& # <-- CodeQL parse error occurs here
)
end

# This works fine - single line call
def working_method(&)
simple_call(&)
end

private

def some_method_call(keyword_arg1:, keyword_arg2:, keyword_arg3:, &block)
yield if block_given?
end

def simple_call(&block)
yield if block_given?
end
end
```

### Environment
- Repo: [rubygems/rubygems.org](https://github.com/rubygems/rubygems.org)
- recent [workflow run](https://github.com/rubygems/rubygems.org/actions/runs/17104368086/job/48509269173?pr=5925))
- [offending file](https://github.com/rubygems/rubygems.org/blob/ae3f654e67d74122a692de4e7832fa6657d98a7a/app/controllers/concerns/avo_auditable.rb#L26)
- [offending file](https://github.com/rubygems/rubygems.org/blob/ae3f654e67d74122a692de4e7832fa6657d98a7a/app/controllers/concerns/maintenance_tasks_auditable.rb#L26)
- CodeQL CLI version: 2.15.5
- Ruby version: 3.4.x
- Syntax: Valid Ruby (confirmed with ruby -c)

### 📝 Notes

- The issue only occurs with multi-line method calls where & appears on its own line
- Single-line calls with & work correctly
- Named block parameters (e.g., &block) work in all contexts
- This is valid Ruby 3.1+ anonymous block forwarding syntax

### Impact

This prevents CodeQL security analysis on codebases using modern Ruby block forwarding patterns, forcing developers to use less idiomatic code or exclude files from analysis.