test: split test-runner-watch-mode-kill-signal #9

Job	Run time
x86_64-linux: with shared libraries	46m 20s
aarch64-darwin: with shared libraries	1h 0m 14s
x86_64-darwin: with shared libraries	1h 16m 39s
aarch64-linux: with shared libraries	32m 44s
	3h 35m 57s

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