test

Restore original signal handler in test_timeout_in_trap_handler #286

Job	Run time
ruby-versions / Generate Ruby versions	3s
build (2.7 / macos-latest)	35s
build (2.6 / macos-latest)	33s
build (3.0 / macos-latest)	17s
build (2.7 / ubuntu-latest)	27s
build (3.3 / ubuntu-latest)	11s
build (2.6 / ubuntu-latest)	25s
build (3.2 / macos-latest)	14s
build (3.1 / macos-latest)	16s
build (3.1 / ubuntu-latest)	11s
build (3.0 / ubuntu-latest)	10s
build (3.2 / ubuntu-latest)	11s
build (truffleruby-head / macos-latest)	33s
build (head / macos-latest)	15s
build (3.3 / macos-latest)	16s
build (truffleruby / ubuntu-latest)	25s
build (head / ubuntu-latest)	12s
build (2.6 / windows-latest)	1m 37s
build (3.4 / windows-latest)	1m 0s
build (3.4 / macos-latest)	12s
build (3.4 / ubuntu-latest)	11s
	8m 14s

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