Allow Layout/EmptyLineAroundAttributeAccessor cop to ignore immediate keyword declarations

[ashmaroli]

Is your feature request related to a problem? Please describe.

Say, I have the following class;

class Foo
  attr_reader :alpha, :beta
  private :beta

  attr_accessor :gamma
  alias_method :delta=, :gamma=
end

Layout/EmptyLineAroundAttributeAccessor cop recommends that my class be refactored into:

class Foo
  attr_reader :alpha, :beta

  private :beta

  attr_accessor :gamma

  alias_method :delta=, :gamma=
end

which IMHO has poorer readability compared to the original.

Describe the solution you'd like

A config option to allow having keywords such as private, protected, public, alias, alias_method, etc to immediately follow the attr*.
(N.B.: I don't want to enforce this, just have such occurrences ignored by the cop)

Describe alternatives you've considered

Exclude the file for the cop in .rubocop.yml