periodic-sched: fix file leak and reuse a single file #9

Job	Run time
integration-smoke-test (alpine-3.16-8)	1m 24s
integration-smoke-test (alpine-3.16-11)	1m 23s
integration-smoke-test (alpine-3.16-17)	1m 26s
integration-smoke-test (alpine-3.17-8)	1m 20s
integration-smoke-test (alpine-3.17-11)	1m 30s
integration-smoke-test (alpine-3.17-17)	1m 26s
integration-smoke-test (alpine-3.18-8)	1m 24s
integration-smoke-test (alpine-3.18-11)	1m 35s
integration-smoke-test (alpine-3.18-17)	1m 23s
integration-smoke-test (alpine-3.19-8)	1m 19s
integration-smoke-test (alpine-3.19-11)	1m 29s
integration-smoke-test (alpine-3.19-17)	1m 27s
integration-smoke-test (ubuntu-18.04-8)	1m 50s
integration-smoke-test (ubuntu-18.04-11)	1m 47s
integration-smoke-test (ubuntu-18.04-17)	1m 44s
integration-smoke-test (ubuntu-20.04-8)	1m 35s
integration-smoke-test (ubuntu-20.04-11)	1m 51s
integration-smoke-test (ubuntu-20.04-17)	1m 58s
integration-smoke-test (ubuntu-20.04-21)	1m 40s
integration-smoke-test (ubuntu-22.04-8)	1m 27s
integration-smoke-test (ubuntu-22.04-11)	1m 41s
integration-smoke-test (ubuntu-22.04-17)	1m 36s
integration-smoke-test (ubuntu-22.04-21)	1m 45s
	36m 0s

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