opentelemetry: Increase limit resources

Only 2 workers for production. It's still maximizing the cpu usage (~99%) and exceeding
the ram usage too [1] (max 14.68Gib).

[1] https://grafana.softwareheritage.org/goto/oPt0RLU4z?orgId=1

Refs. swh/infra/sysadm-environment#4524

cluster-configuration/values/archive-production-rke2.yaml

@@ -27,8 +27,8 @@ otlpCollector:
     swh: logs-swh-production
     system: logs-system-production
   resources:
-    cpu: 512m
-    memory: 4Gi
+    cpu: 1024m
+    memory: 16Gi
     batch: 10
     timeout: 10s
   endpoints: