newlog: fix file naming for logs #9284

Job	Run time
packages (buildjet-4vcpu-ubuntu-2204-arm, arm64)	3m 48s
packages (buildjet-4vcpu-ubuntu-2004, amd64)	3m 14s
packages (buildjet-4vcpu-ubuntu-2004, riscv64)	1m 42s
eve (arm64, xen, generic)	8m 21s
eve (arm64, kvm, generic)	7m 47s
eve (amd64, xen, generic)	7m 28s
eve (amd64, kvm, generic)	6m 52s
eve (amd64, kubevirt, generic)	11m 12s
eve (riscv64, mini, generic)	3m 6s
eve (amd64, kvm, rt)	8m 23s
eve (arm64, kvm, nvidia)	10m 28s
eve (arm64, kvm, imx8mp_pollux)	7m 8s
eve (arm64, kvm, imx8mp_epc_r3720)	8m 55s
	1h 28m 24s

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