## What this PR does
Fixescozystack/cozystack#3974: the values override at
`packages/system/mariadb-operator/values.yaml` targeted
`webhook.certificate.certManager`, a field that does not exist in the
vendored mariadb-operator chart. The chart's actual key is
`webhook.cert.certManager.enabled` (see
`charts/mariadb-operator/values.yaml:139-142`), so the override was
silently ignored and the webhook always fell back to mariadb-operator's
own cert-controller instead of cert-manager. This corrects the key path
so the override takes effect.
### Screenshots
Not applicable, no UI change.
### Downstream repositories
- [x] No downstream repository is affected by this change
### Release note
```release-note
fix(mariadb): correct webhook cert-manager override key path so cert-manager is actually used for the mariadb-operator webhook certificate
```
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Chores**
* Updated the MariaDB operator’s certificate-management configuration to
use its current setting structure. The certificate manager remains
enabled, now under the updated configuration path. Installations that
use the operator will apply the enabled setting from the revised values
configuration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Aleksei Sviridkin
9c94337f17