Update kernel to tip of 'cos/main-R121-cos-6.6'

BUG=b/444470240
TEST=presubmit,validation
RELEASE_NOTE=Updated the Linux kernel to v6.6.105.

Change-Id: I3ccf60f18663df00c8d0bb7553f7e6f0ba7015fa
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/111203
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Kevin Berry <kpberry@google.com>