migration/options: Add x-ignore-shared

This aids scriptings only.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20251205172054.288909-1-peterx@redhat.com
[peterx: make the property x-ignore-shared to match, per cedric]
[peterx: fix over-80 line]
Signed-off-by: Peter Xu <peterx@redhat.com>
1 file changed