When a class has a belongs_to or has_one relationship with dependent: :destroy
option enabled, objects of this class should not be deleted if it's dependents
cannot be deleted.

Example:

    class Parent
      has_one :child, dependent: :destroy
    end

    class Child
      belongs_to :parent, inverse_of: :child
      before_destroy { throw :abort }
    end

    c = Child.create
    p = Parent.create(child: c)

    p.destroy

    p.destroyed? # expected: false; actual: true;

Fixes #32022