* Export cli server flags and etcd restoration functions (#3527)

* Export cli server flags and etfd restoration functions
Signed-off-by: galal-hussein <hussein.galal.ahmed.11@gmail.com>

* export S3
Signed-off-by: galal-hussein <hussein.galal.ahmed.11@gmail.com>
Signed-off-by: Chris Kim <oats87g@gmail.com>

* Add etcd extra args support for K3s
Signed-off-by: Chris Kim <oats87g@gmail.com>

* Remove integration test
Signed-off-by: Chris Kim <oats87g@gmail.com>
Co-authored-by: Hussein Galal <galal-hussein@users.noreply.github.com>