Expand accordion_item to include slot component for counts
What
Update https://gitlab.com/gitlab-org/gitlab-ui/-/blob/main/src/components/base/accordion/accordion_item.vue to include an extra slot for badges
Why
For context, in gitlab#413735 (comment 1750431138) we weren't able to properly add badge counts due to the component being limited
Note:
There is a potential other solution that might not require this upstream change to gitlab-ui but as we wanted to release grouping (Add grouping count when adherences are grouped (gitlab#440215) • Unassigned • Backlog) was created and this corresponding issue highlights the potential solution to expand accordion item