Ruby

Add `_Deferred` type #387

Job	Run time
rubocop (3.3)	13s
ruby-versions / Generate Ruby versions	1s
test (3.1)	12s
test (3.2)	11s
test (3.3)	7s
test (head)	7s
test (jruby)	28s
test (jruby-head)	25s
test (truffleruby)	20s
test (truffleruby-head)	25s
	2m 29s

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