Don't merge: ICON4Py staging

[havogt]

If you update this branch, please start from main, add individual PRs on top and update the list of PRs below.

Contains on top of main:

• feat[next]: Integration of concat_where #1713
• https://github.com/edopao/gt4py/tree/gtir-dace-concat_where

Update instructions:

git checkout main
git pull
git checkout GTIR_concat_where
git pull
git merge main
git push
git checkout gtir-dace-concat_where
git merge GTIR_concat_where
git push
NEW_COMMIT="$(git rev-parse HEAD)"
git checkout icon4py_staging
git reset --hard $NEW_COMMIT
git push

[edopao]

All concat_where development branches are merged into main.