Ruby

Fix handling of PostExecutionNode #1108

Job	Run time
ruby-versions / Generate Ruby versions	2s
build (3.2)	40s
build (3.3)	42s
build (3.4)	44s
build (head)	40s
build (truffleruby)	34s
build (truffleruby-head)	34s
	3m 56s

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