Ruby

Fix missing ClassVariableWriteNode.new #1294

Job	Run time
ruby-versions / Generate Ruby versions	5s
build (truffleruby)	39s
build (head)	40s
build (3.3)	56s
build (4.0)	44s
build (3.4)	53s
build (truffleruby-head)	43s
	4m 40s

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