Added sigterm to the signal handler for Benchmark #2963

Job	Run time
codecheck / codecheck	43m 55s
docker / docker (fedora39)	20m 13s
docker / docker (rocky8)	23m 22s
linux / linux (-doc-mpi-)	40m 12s
conda / conda (ubuntu-20.04)	10m 28s
linux / linux (-mpi-)	51m 33s
conda / conda (macos-12)	25m 47s
linux / linux (-coverage-mpi-)	59m 38s
conda / conda (macos-14)	8m 20s
mac / macports (macos-12)	1h 47m 58s
linux / linux (-debug-)	31m 3s
mac / macsimple (macos-12)	13m 22s
linux / linux (-debug-mpi-)	40m 13s
mac / macports (macos-14)	1h 22m 29s
mac / macsimple (macos-14)	4m 54s
mac / macports (+allmodules, macos-12)	1h 46m 39s
linux / linux (-intel-)	44m 1s
linux / linux (-pycv-mpi-)	16m 54s
	12h 11m 1s

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