Add support for qemuarm/64 machines with EFI

Fixes #667 (closed) Fixes docs#126 (closed)

TODO (do not merge if any pending):

• update docs
• mention new machines in build templates
• upstream edk2 and grub/grub-efi fixes - #766
• upstream the machines - #767 (closed)
• ci
• add ci jobs docs - #765
• drop unsupported machines from everywhere in this repo (qemuarm, qemuarm64, generic...)
• cleanup machine defconfigs - #770 (closed)

meta-oniro-core/recipes-core/sysota/sysota_git.bb

@@ -112,6 +112,9 @@ SYSOTA_BOOTLOADER_TYPE:qemux86-64 := "GRUB"
 SYSOTA_MODEL:qemuarm-efi := "QEMU Virtual Machine"
 SYSOTA_BOOTLOADER_TYPE:qemuarm-efi := "GRUB"
 
+SYSOTA_MODEL:qemuarm64-efi := "QEMU Virtual Machine"
+SYSOTA_BOOTLOADER_TYPE:qemuarm64-efi := "GRUB"
+
 SYSOTA_MODEL:seco-intel-b68 := "B68 / Alvin"
 SYSOTA_BOOTLOADER_TYPE:seco-intel-b68 := "GRUB"