feat(vm): surface the “No bootable device” error in the VM

[eofff]

Description

Surface the “No bootable device” error in the VM.

Why do we need it, and what problem does it solve?

What is the expected result?

Checklist

• The code is covered by unit tests.
• e2e tests passed.
• Documentation updated according to the changes.
• Changes were tested in the Kubernetes cluster manually.

Changelog entries

section: vm
type: feature
summary: Surface the “No bootable device” error in the VM.

[deckhouse-BOaTswain]

Workflow has started.
Follow the progress here: Workflow Run

The target step completed with status: failure.

[diafour]

Suggested change

	echo "Applying $p"
	git apply "$p"
	echo -n "Apply ${p} ... "
	git apply --ignore-space-change --ignore-whitespace ${p} && echo OK || (echo FAIL ; exit 1)

For consistency with other images.