Migrate to backup-restore-sidecar based meilisearch database.

[Gerrit91]

References metal-stack/backup-restore-sidecar#54.

This is a breaking change, so this PR requires a minor release of metal-roles.

• Cleanup release vector
• Adapt mini-lab (Adapt to meilisearch backup-restore-sidecar support. mini-lab#143)

With the initial support for meilisearch in the [backup-restore-sidecar](https://github.com/metal-stack/backup-restore-sidecar), the deployment of the meilisearch database changed from helm-charts to self-managed manifests. If you enabled auditing, your deployment has to adapt to the new role variables. After the rollout of this release, you should manually delete the existing helm installation of meilisearch.