Update dependency @reduxjs/toolkit to v2 (merge commit)

Merge branch 'renovate/reduxjs-toolkit-2.x' into 'main'
* Update to latest reduxjs/toolkit version 2.1.0

* Update dependency @reduxjs/toolkit to v2

See merge request https://gitlab.ci.csc.fi/sds-dev/sd-submit/metadata-submitter-frontend/-/merge_requests/927

Approved-by: Stefan Negru <stefan@blankdots.com>
Co-authored-by: renovate-bot <group183_bot1@noreply.gitlab.ci.csc.fi>
Merged by Hang Le <lhang@csc.fi>