Merge branch 'zj-fix-label-creation-non-members' into 'security'

app/services/issuable_base_service.rb

app/services/labels/find_or_create_service.rb

changelogs/unreleased/zj-fix-label-creation-non-members.yml

lib/api/helpers.rb

lib/api/issues.rb

lib/api/merge_requests.rb

spec/requests/api/issues_spec.rb

spec/requests/api/merge_requests_spec.rb

spec/services/labels/transfer_service_spec.rb