Validate disk size against image size on disk create form

[david-crespo]

On instance create, we validate the size of the boot disk against the size of the chosen image, and when you change the image, we update the size to be big enough for it if necessary.

console/app/forms/instance-create.tsx

Lines 331 to 341 in 0cc1e03

	// Imitate API logic: only require that the disk is big enough to fit the image
	validate={(diskSizeGiB) => {
	if (!image) return true
	if (diskSizeGiB < image.size / GiB) {
	const minSize = Math.ceil(image.size / GiB)
	return `Must be as large as selected image (min. ${minSize} GiB)`
	}
	if (diskSizeGiB > MAX_DISK_SIZE_GiB) {
	return `Can be at most ${MAX_DISK_SIZE_GiB} GiB`
	}
	}}

On the standalone disk create form, we don't do that, and we should.

console/app/forms/disk-create.tsx

Line 96 in 0cc1e03

<DiskSizeField name="size" control={form.control} />

[david-crespo]

This could be worth picking up @charliepark if you become an expert on this while working on #1823.