Add a workflow to sync commits to ruby/ruby (#143) #489

Job	Run time
ruby-versions / Generate Ruby versions	4s
ubuntu-24.04 2.7	49s
ubuntu-24.04 3.0	22s
ubuntu-24.04 3.1	22s
ubuntu-24.04 3.2	32s
ubuntu-24.04 head	22s
ubuntu-24.04 debug	31s
ubuntu-24.04 3.4	18s
ubuntu-24.04 3.3	30s
ubuntu-24.04 jruby-head	1m 2s
ubuntu-22.04 3.0	23s
ubuntu-24.04 truffleruby-head	37s
ubuntu-22.04 3.2	30s
ubuntu-22.04 3.4	28s
ubuntu-22.04 3.3	31s
ubuntu-22.04 2.7	52s
ubuntu-22.04 debug	29s
ubuntu-22.04 jruby-head	1m 42s
ubuntu-22.04 truffleruby-head	43s
ubuntu-22.04 head	28s
ubuntu-22.04 3.1	30s
	12m 5s

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