🐛 Fix local tilt setup

[furkatgofurov7]

What this PR does / why we need it:
etcd-restore image is already built as part of the turtles Dockerfile located in the root of repo and binary called as manager. As is it fails to find the ./etcd-snapshot-restore command:

turtles-etcd… │ [event: pod rancher-turtles-system/rancher-turtles-etcdsnapshotrestore-controller-manager-5858znqr] Error: failed to create containerd task: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "./etcd-snapshot-restore": stat ./etcd-snapshot-restore: no such file or directory: unknown

So, this patch renames the command to use the correct binary name, removes redundant commands and original Dockerfile from the exp/etcdrestore folder.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

Checklist:

• squashed commits into logical changes
• includes documentation
• adds unit tests
• adds or updates e2e tests