Ruby

Use nested hashes for edge storage in ChangeSet #1347

Job	Run time
ruby-versions / Generate Ruby versions	5s
build (3.3)	59s
build (truffleruby)	37s
build (3.4)	57s
build (4.0)	46s
build (head)	47s
build (truffleruby-head)	46s
	4m 57s

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