kvm-tools: Fix tarball snapshot URL and remove unused file #2224

Job	Run time
packages (arm64-secure, arm64)	8m 51s
packages (ubuntu-20.04, amd64)	4m 2s
packages (ubuntu-latest, riscv64)	11m 49s
manifest	6m 51s
eve (arm64, kvm)	34m 15s
verification (arm64, kvm)	8m 59s
eve (arm64, xen)	34m 46s
eve (amd64, kvm)	34m 45s
verification (arm64, xen)	7m 35s
eve (amd64, xen)	26m 37s
verification (amd64, kvm)	8m 57s
verification (amd64, xen)	7m 51s
eve (riscv64, mini)	4m 47s
trigger_assets / build (amd64)	3m 1s
trigger_assets / build (arm64)	2m 37s
	3h 25m 43s

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