Fix false positive for `RSpec/EmptyExampleGroup` cop with iterator and simple conditional #2449

Job	Run time
Test coverage	19s
Edge RuboCop: internal_investigation	15s
Edge RuboCop: spec	23s
Confirm config and documentation	12s
Ruby 2.7: internal_investigation	26s
Prism	34s
Oldest RuboCop: spec	20s
Ruby 2.7: spec	33s
Ruby 3.0: internal_investigation	12s
Ruby 3.0: spec	22s
RSpec 4	19s
Ruby 3.1: internal_investigation	11s
Ruby 3.1: spec	22s
Ruby 3.2: internal_investigation	14s
Ruby 3.2: spec	23s
Ruby 3.3: internal_investigation	12s
Ruby 3.3: spec	18s
Ruby 3.4: internal_investigation	12s
Ruby 3.4: spec	22s
Ruby ruby-head: internal_investigation	12s
Ruby ruby-head: spec	23s
Ruby jruby-9.4: internal_investigation	1m 21s
Ruby jruby-9.4: spec	1m 24s
	9m 29s

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