[feature request] Allow ObjectStore config to ignore endpointCA SSL validation

More of a feature request, I would like to see an option in the `ObjectStore` spec to ignore the endpoint's SSL certificate validation. For example:

```yaml
apiVersion: barmancloud.cnpg.io/v1
kind: ObjectStore
metadata:
name: my-obj-store
spec:
configuration:
endpointURL: https://minio.dev-or-lab-environment
endpointCA:
ignore: true
```

Occasionally, the CA certificate might not be available or we simply wish to ignore it because it's not relevant.