fix(nextcloud): fix chroot + synchronisation

- add better hurl coverage on nextcloud chrooted login
    - fix issue with nextcloud using /{drive name}/~{drive id}/
    - fix trashbin handler

    confusion username vs {username}~{folder id}

tests/api/run.sh

@@ -186,6 +186,7 @@ hurl --variables-file "$API_DIR/test.env" --file-root "$REPO_ROOT/tests" --test
   "$API_DIR/drive_policies.hurl" \
   "$API_DIR/cross_drive_move.hurl" \
   "$API_DIR/cross_drive_copy.hurl" \
+  "$API_DIR/nc_multidrive_move_regression.hurl" \
   "$API_DIR/webdav_dead_properties.hurl" \
   "$API_DIR/webdav_drive_root.hurl" \
   "$API_DIR/webdav_permissions.hurl" \