Modified version of the `lib/rubocop/cop/rspec/subject_stub.rb` cop to detect `expect(subject).to all receive(...)` syntax only

subject_stub.rb

        def_node_matcher :message_expectation?, <<-PATTERN
          (send
            {
              (send nil? { :expect :allow } (send nil? %))
              (send nil? :is_expected)
            }
            #{Runners::ALL.node_pattern_union}
            #all_matcher?
          )
        PATTERN

        def_node_search :all_matcher?, <<-PATTERN
          (send nil? :all #message_expectation_matcher?)
        PATTERN

        def_node_search :message_expectation_matcher?, <<-PATTERN
            (send nil? {
              :receive :receive_messages :receive_message_chain :have_received
            } ... )
        PATTERN

test file

RSpec.describe 'a' do
  subject(:a) {}

  it { expect(a).to all receive(:b) }
  it { expect(a).to all receive(:b).with(1) }
  it { expect(a).to all receive(:b).with(1).and_sdfsd { 1 } }
  it { expect(a).to receive(:c) }
  it { expect(a).to receive(:b).with(1).and_sdfsd { 1 } }
end


spec/a_spec.rb:4:8: C: RSpec/SubjectStub: Do not stub methods of the object under test.
  it { expect(a).to all receive(:b) }
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
spec/a_spec.rb:5:8: C: RSpec/SubjectStub: Do not stub methods of the object under test.
  it { expect(a).to all receive(:b).with(1) }
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
spec/a_spec.rb:6:8: C: RSpec/SubjectStub: Do not stub methods of the object under test.
  it { expect(a).to all receive(:b).with(1).and_sdfsd { 1 } }
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^