stream: align `@@toStringTag` with other Web Streams implementations
None of the other implementations are using a getter, let's align.
Alternative to https://github.com/nodejs/node/pull/45117. Fixes: https://github.com/nodejs/node/issues/45114
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
None of the other implementations are using a getter, let's align.
Alternative to https://github.com/nodejs/node/pull/45117. Fixes: https://github.com/nodejs/node/issues/45114