pillar: Fix OVMF binary file for ARM64 #8794

Job	Run time
packages (buildjet-4vcpu-ubuntu-2204-arm, arm64)	4m 2s
packages (buildjet-4vcpu-ubuntu-2004, amd64)	3m 7s
packages (buildjet-4vcpu-ubuntu-2004, riscv64)	1m 41s
eve (arm64, xen, generic)	8m 5s
eve (arm64, kvm, generic)	8m 3s
eve (amd64, xen, generic)	6m 33s
eve (amd64, kvm, generic)	7m 16s
eve (riscv64, mini, generic)	3m 1s
eve (amd64, kvm, rt)	7m 22s
eve (arm64, kvm, nvidia)	8m 41s
eve (arm64, kvm, imx8mp_pollux)	8m 29s
eve (arm64, kvm, imx8mp_epc_r3720)	6m 57s
	1h 13m 17s

Provide feedback