test_runner: remove runtime experimental warning
This commit removes the experimental warning that is emitted when the test runner is used. The test runner feature is still considered experimental, but this change makes its output easier to read.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This commit removes the experimental warning that is emitted when the test runner is used. The test runner feature is still considered experimental, but this change makes its output easier to read.