build

Add a workflow to sync commits to ruby/ruby #1821

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (2.7 / ubuntu-latest)	33s
build (2.7 / macos-latest)	36s
build (3.0 / ubuntu-latest)	19s
build (2.6 / macos-latest)	48s
build (2.6 / windows-latest)	2m 4s
build (2.7 / windows-latest)	1m 53s
build (3.1 / ubuntu-latest)	17s
build (3.1 / macos-latest)	27s
build (3.0 / macos-latest)	18s
build (3.1 / windows-latest)	1m 28s
build (3.0 / windows-latest)	1m 19s
build (3.3 / windows-latest)	1m 21s
build (3.4 / macos-latest)	15s
build (2.6 / ubuntu-latest)	32s
build (3.2 / ubuntu-latest)	23s
build (3.3 / ubuntu-latest)	22s
build (truffleruby-head / ubuntu-latest)	49s
build (3.3 / macos-latest)	19s
build (3.2 / macos-latest)	17s
build (3.4 / ubuntu-latest)	23s
build (truffleruby-head / macos-latest)	47s
build (mswin / windows-2022)	1m 27s
build (3.4 / windows-latest)	1m 27s
build (3.2 / windows-latest)	1m 35s
build (head / ubuntu-latest)	18s
build (head / macos-latest)	30s
build (mingw / windows-latest)	2m 31s
	23m 22s

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