doc: revise strategic initiatives text
Now that it's in the core repo, so ome of the TSC-centric text doesn't make as much sense as it did when it was in the TSC repo.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Now that it's in the core repo, so ome of the TSC-centric text doesn't make as much sense as it did when it was in the TSC repo.