[LogsDB] [Subscription basic] [otlp_input_otel] Failing test daily: system test: only-metrics (variant: http) in otlp_input_otel.

- Stack version: maximum of either the version used in PR builds or 8.17.0 (GA version for LogsDB index mode)
- LogsDB: enabled
- Subscription: basic
- Package: otlp_input_otel
- Failing test: system test: only-metrics (variant: http)
- Owners:
- @elastic/obs-ds-intake-services

Error:
```
could not assign policy to agent: error occurred while waiting for the policy to be assigned to all agents: timeout: policy hasn't been assigned in time
```

First build failed: https://buildkite.com/elastic/integrations/builds/49558

Start with the linked Buildkite build and the `system test: only-metrics (variant: http)` in `otlp_input_otel`; inspect the failing setup around the policy-assignment timeout. Done means the daily test completes successfully without timing out while assigning the policy to agents.

Written by the indexing model from the issue text.