[8.18] Handle the indices pattern `["*", "-*"]` when grouping indices by cluster name (#128610)#128843

elasticsearchmachine merged 2 commits intoelastic:8.18elastic/elasticsearch:8.18from

pawankartik-elastic:backport/8.18/pr-128610pawankartik-elastic/elasticsearch:backport/8.18/pr-128610Copy head branch name to clipboard