test: Fix CS9 UEFI installation failure issue

test/cases/ostree-ng.sh

@@ -559,6 +559,15 @@ sudo rm -f "$LIBVIRT_BIOS_IMAGE_PATH"
 ## Install, upgrade and test Edge image on UEFI VM
 ##
 ##################################################
+
+# Since virt-install 4.0.0, loader attribute can't be configured here,
+# otherwise it'll report "loader attribute 'readonly' cannot be specified
+# when firmware autoselection is enabled"
+if nvrGreaterOrEqual "virt-install" "4.0.0"; then
+    BOOT_UEFI_ARGS="uefi"
+else
+    BOOT_UEFI_ARGS="uefi,loader_ro=yes,loader_type=pflash,nvram_template=/usr/share/edk2/ovmf/OVMF_VARS.fd,loader_secure=no"
+fi
 # Install ostree image via anaconda.
 greenprint "💿 Install ostree image via installer(ISO) on UEFI VM"
 sudo virt-install  --name="${IMAGE_KEY}-uefi"\
@@ -569,7 +578,7 @@ sudo virt-install  --name="${IMAGE_KEY}-uefi"\
                    --os-type linux \
                    --os-variant ${OS_VARIANT} \
                    --cdrom "/var/lib/libvirt/images/${ISO_FILENAME}" \
-                   --boot uefi \
+                   --boot "$BOOT_UEFI_ARGS" \
                    --nographics \
                    --noautoconsole \
                    --wait=-1 \