Rails/BelongsTo does not work with scoped associations

[syakovyn]

The cop Rails/BelongsTo does not warn about using required keyword in
belongs_to :event, -> { with_deleted }, inverse_of: :task_work_templates, required: true

However, it works as expected when the scope is removed
belongs_to :event, inverse_of: :task_work_templates, required: true

---

Expected behavior

The cop warns about using the required keyword in belongs_to no matter a scope is specified or not.

Actual behavior

The cop does not warn about using the required keyword in belongs_to when a scope is specified.

Steps to reproduce the problem

Add a scope, e.g. -> {} to any existing belongs_to that uses required.

RuboCop version

$ bundle exec rubocop -V
1.9.1 (using Parser 3.0.0.0, rubocop-ast 1.4.1, running on ruby 2.7.2 x86_64-darwin19)
  - rubocop-performance 1.8.1
  - rubocop-rails 2.9.1
  - rubocop-rspec 2.2.0