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/wic/x-gpt-efi-disk.wks.in

@@ -23,7 +23,7 @@
 #
 # We don't want to have a duplicate file but there's no support for relative
 # paths so use a symbolic link instead.
-bootloader --configfile=grub.cfg --ptable gpt --timeout=${WIC_BOOTLOADER_TIMEOUT} --append=" rootfstype=${ROOT_FSTYPE} "
+bootloader --configfile="${DEPLOY_DIR_IMAGE}/grub.cfg" --ptable gpt --timeout=${WIC_BOOTLOADER_TIMEOUT} --append=" rootfstype=${ROOT_FSTYPE} "
 
 part --source bootimg-efi --sourceparams="loader=${EFI_PROVIDER}" --label ${BOOT_PARTITION_LABEL} --active --align 4096 --offset 4096 --fixed-size ${BOOT_PARTITION_SIZE}
 ${WIC_ROOTA_PARTITION}