rancher-operator was merged into rancher[1] and won't be installed
separately going forward on 2.6. This deletes the charts so they won't
be erroneously caught by image-scanning.
[1] https://github.com/rancher/rancher/pull/32170
This commit completes the migration to the new charts-build-scripts by doing the following:
- Deletes assets/index.yaml (unnecessary remnant of the old charts build scripts)
- Recreates the charts directory to have the new expected directory structure
- Updates the timestamps on the index.yaml
Signed-off-by: Arvind Iyengar <arvind.iyengar@rancher.com>