PatchEnvelopes: fix zedrouter/patchenvelopes_test #1874

Job	Run time
packages (arm64-secure, arm64)	6m 54s
packages (ubuntu-20.04, amd64)	4m 47s
packages (ubuntu-latest, riscv64)	3m 36s
verification (arm64, kvm)	13m 30s
eve (arm64, kvm)	30m 16s
manifest	6m 0s
eve (arm64, xen)	32m 40s
verification (arm64, xen)	7m 16s
eve (amd64, kvm)	39m 17s
verification (amd64, kvm)	7m 25s
eve (amd64, xen)	42m 15s
verification (amd64, xen)	8m 16s
eve (riscv64, mini)	5m 3s
trigger_assets	0s
	3h 27m 15s

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