macOS

[ruby/io-console] Ignore `^C` at interrupt #647

Job	Run time
make (test-bundler-parallel, macos-14)	16m 7s
make (test-all, --repeat-count=2, macos-14)	10m 22s
make (check, macos-15)	6m 18s
make (check, macos-14, --with-gmp)	5m 28s
make (check, macos-14, --with-gcc=gcc-14)	7m 55s
make (test-bundled-gems, macos-14)	12m 26s
make (check, macos-14, --with-jemalloc --with-opt-dir=$(brew --prefix jemalloc))	6m 58s
make (check, macos-13)	9m 1s
make (check, macos-14)	6m 52s
macOS result	4s
	1h 21m 31s

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