Enable ESLint's import/order rule as error
What does this MR do?
Enables ESLint's import/order rule as error, which was disabled once in !21129 (merged).
cf. similar work (!21103 (closed)) before merging manual fixing MRs: https://gitlab.com/gitlab-org/gitlab/merge_requests?state=all&milestone_title=12.6&search=eslint-plugin-import
Blocked by !24099 (merged)
Closes #32486 (closed)
Edited by 🤖 GitLab Bot 🤖