[v18.x backport] deps: update icu to 74.2
- deps: update icu to 74.1
- deps: update timezone to 2023d
- tools: fix update-icu.sh
- deps: update icu to 74.2
- deps: update timezone to 2024a
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data