macos

Add a workflow to sync commits to ruby/ruby #488

Job	Run time
ruby-versions / Generate Ruby versions	6s
macos-13 3.2	52s
macos-13 3.1	28s
macos-13 3.0	38s
macos-13 2.7	1m 19s
macos-13 3.3	52s
macos-13 3.4	46s
macos-14 2.7	43s
macos-14 3.1	22s
macos-13 jruby-head	1m 54s
macos-14 3.2	20s
macos-13 debug	56s
macos-13 head	30s
macos-14 head	20s
macos-14 3.0	24s
macos-14 3.4	23s
macos-14 debug	25s
macos-14 jruby-head	1m 24s
macos-14 3.3	17s
	12m 59s

Provide feedback