KTD functionality from cos-5.15 to 6.1 Migrate aggregated KTD functionality from 5.15 to 6.1. From cos/cos-5.15 1389c4da2d97 BUG=b/270972462 SOURCE=KTD Change-Id: I27dc14bdcc9260aeb65936a9bb5cf6d20a18d32a Signed-off-by: Ken Hofsass <hofsass@google.com> Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/52010 Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Reviewed-by: Oleksandr Tymoshenko <ovt@google.com>