dynamic_vm: use instance variable for qemu_binary

Change-Id: I75cfbc91c521b288b5bafdf07254a71c9296e8d3
boot_cmds: add testboot_partition to override testboot_offset

Change-Id: I8ea5bfd408c62240326a252e01c0ada79833d420
qemu: add arm, mips, ppc, and aarch64 configurations

Change-Id: I99f121228036476a1eddde3a2077eaa5d9a74f4d
bootloader: update zImage load addresses for kernel ci

Change-Id: I705866992e25ae02d5793750cdee2142fe0adbf3