Disable fstrim service and timer

Utility fstrim can cause filesystem issues on some scenarios and there is a list of hardware that does not cope well with it. Since Apertis is a Linux distribution for embedded devices, the default should be not to enable fstrim, as it is in v2021.

Fix the issue by not enabling fstrim service and timer.

infrastructure/apertis-issues#70 (closed)

Signed-off-by: Walter Lozano walter.lozano@collabora.com