* k8s 1.18 import wip

backup, cmd, controller, generated, restic, restore, serverstatusrequest, test and util
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* go mod tidy
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* add changelog file
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* go fmt
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* update code-generator and controller-gen in CI
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* checkout proper code-generator version, regen
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* fix remaining calls
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* regenerate CRDs with ./hack/update-generated-crd-code.sh
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* use existing context in restic and server
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* fix test cases by resetting resource version

also use main library go context, not golang.org/x/net/context, in pkg/restore/restore.go
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* clarify changelog message
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* use github.com/kubernetes-csi/external-snapshotter/v2@v2.2.0-rc1
Signed-off-by: Andrew Lavery <laverya@umich.edu>

* run 'go mod tidy' to remove old external-snapshotter version
Signed-off-by: Andrew Lavery <laverya@umich.edu>