ENYO-3550: Add bootplate-2.3.0-pre.12 in ide.json

Details in JIRA: https://enyojs.atlassian.net/browse/ENYO-3550

Enyo-DCO-1.1-Signed-off-by: Marie-Antoinette de Bonis-Hamelin (Marian)
marie-antoinette.de-bonis-hamelin@hp.com