'apify validate-schema' should validate all schemas in actor.json, not just input_schema

[metalwarrior665]

[l2ysho]

currently we use this priority for input schema

  1. Object in '${LOCAL_CONFIG_PATH}' under "input" key
  2. JSON file path in '${LOCAL_CONFIG_PATH}' "input" key
  3. .actor/INPUT_SCHEMA.json
  4. INPUT_SCHEMA.json

so it should be easy to replicate for other 3

    "output": "./output_schema.json",
    "storages": {
        "dataset": "./dataset_schema.json",
        "keyValueStore": "./key_value_store_schema.json"
    },

seems easy but just to make sure @vladfrangu can you give me go / no-go ?