Disable fstrim timer and service
After a long investigation it was found that fstrim triggered filesystem error on different boards (but not others of same model).
It was also found that on v2021 fstrim.timer is not enabled due to a bug explaining why this issue was not found in that release.
As an initial fix disable fstrimtimer and service.
This fix is only needed in v2022 since the new version of util-linux landed
in -security and on the bootstrap process the previous version is installed
and then updated.
Signed-off-by: Walter Lozano walter.lozano@collabora.com