drt: fetching datadog-api-key is broken

Several drt configs rely on `pkg/cmd/drtprod/scripts/setup_datadog_cluster` which retrieves the datadog API key from the secrets vault. This used to work previously. However, now IAM permissions for `Editor` do not have the required `secretmanager.versions.access`, resulting in the following failure,

```
gcloud secrets versions access latest --secret datadog-api-key
ERROR: (gcloud.secrets.versions.access) PERMISSION_DENIED: Permission 'secretmanager.versions.access' denied on resource (or it may not exist). This command is authenticated as [622274581499-compute@developer.gserviceaccount.com](mailto:622274581499-compute@developer.gserviceaccount.com) which is the active account specified by the [core/account] property.

'@type': type.googleapis.com/google.rpc.ErrorInfo
domain: iam.googleapis.com
metadata:
permission: secretmanager.versions.access
reason: IAM_PERMISSION_DENIED
```

This means that `roachtest_operations_run.sh` fails on the workload node, since it doesn't have the permission to fetch the API key.

```
grep -r "secrets versions" pkg/cmd/drt/scripts
pkg/cmd/drt/scripts/roachtest_operations_run.sh: if ! secret_value="$(gcloud --project=cockroach-drt secrets versions access latest \
```

Jira issue: CRDB-62237