This avoid clashing of streams with same prefix, but different freq specs

* We must consider avg type and output freq specs, to avoid name clashing
* Since rhist filename contains output control specs, no need to check
  that freq/freq_units/avg_type are unchanged upon restart: if rhist file
  is found, they are ok.

Do not expose option in YAML files anymore. Instead:
- for standalone: always add ranks to filename
- for CIME tests: never add ranks to filename