[7.8] [SECURITY SOLEIL] Fix selection of event type when no siem index signal created (#68291)#68557

XavierM merged 2 commits intoelastic:7.8elastic/kibana:7.8from

XavierM:backport/7.8/pr-68291XavierM/kibana:backport/7.8/pr-68291Copy head branch name to clipboard