Merge branch '428631-vue3-migration-collapsible_sidebar_spec' into 'master'

Remove double component registration in collapsible_sidebar_spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137940



Merged-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Approved-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Approved-by: Stanislav Lashmanov <slashmanov@gitlab.com>
Co-authored-by: Artur Fedorov <afedorov@gitlab.com>