test: deflake test-vm-contextified-script-leak
Similar to the test-vm-source-text-module-leak fix, use a snapshot to force a thorough GC in order to prevent false positives.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Similar to the test-vm-source-text-module-leak fix, use a snapshot to force a thorough GC in order to prevent false positives.