[9.1] Adding merging logic to recursive chunking and renaming SeparatorSet to SeparatorGroup (#131103)#131228

elasticsearchmachine merged 1 commit intoelastic:9.1elastic/elasticsearch:9.1from

dan-rubinstein:backport/9.1/pr-131103dan-rubinstein/elasticsearch:backport/9.1/pr-131103Copy head branch name to clipboard