Add a workaround to make IRB work with debug's tests #3547

Job	Run time
lint	9s
ruby-versions / Generate Ruby versions	3s
rake test 2.7 (latest reline)	1m 14s
vterm-yamatanooroti 2.7 (latest reline)	1m 42s
vterm-yamatanooroti 2.7	1m 33s
rake test 2.7	1m 11s
vterm-yamatanooroti 3.0 (latest reline)	52s
vterm-yamatanooroti 3.0	54s
rake test 3.0 (latest reline)	1m 23s
vterm-yamatanooroti 3.1 (latest reline)	53s
rake test 3.0	1m 6s
vterm-yamatanooroti 3.1	53s
rake test 3.1 (latest reline)	1m 8s
vterm-yamatanooroti 3.2 (latest reline)	58s
rake test 3.1	1m 11s
vterm-yamatanooroti 3.2	51s
rake test 3.2 (latest reline)	1m 3s
vterm-yamatanooroti 3.3 (latest reline)	55s
rake test 3.2	1m 9s
vterm-yamatanooroti 3.3	58s
rake test 3.3 (latest reline)	1m 12s
vterm-yamatanooroti head (latest reline)	59s
rake test 3.3	1m 18s
vterm-yamatanooroti head	1m 0s
rake test head (latest reline)	1m 13s
rake test head	1m 15s
rake test truffleruby-head (latest reline)	2m 34s
rake test truffleruby-head	2m 34s
	32m 11s

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