src: remove icu usage from node_string.cc
Fixes https://github.com/nodejs/node/pull/37954#issuecomment-1420662703
cc @trott @targos
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Fixes https://github.com/nodejs/node/pull/37954#issuecomment-1420662703
cc @trott @targos