Support `Ractor#value` #467

Job	Run time
ruby-versions / Generate Ruby versions	3s
ubuntu-24.04 2.7	43s
ubuntu-24.04 3.0	22s
ubuntu-24.04 3.1	31s
ubuntu-24.04 3.2	18s
ubuntu-24.04 3.3	18s
ubuntu-24.04 3.4	11s
ubuntu-24.04 debug	18s
ubuntu-24.04 head	11s
ubuntu-24.04 jruby-head	1m 0s
ubuntu-24.04 truffleruby-head	40s
ubuntu-22.04 2.7	41s
ubuntu-22.04 3.0	10s
ubuntu-22.04 3.1	16s
ubuntu-22.04 3.2	15s
ubuntu-22.04 3.3	19s
ubuntu-22.04 3.4	17s
ubuntu-22.04 debug	22s
ubuntu-22.04 head	19s
ubuntu-22.04 jruby-head	1m 6s
ubuntu-22.04 truffleruby-head	24s
	8m 44s

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