### Elasticsearch Version

all serverless

### Installed Plugins

_No response_

### Java Version

_bundled_

### OS Version

all

### Problem Description

Creating a time series instance in Serverless fails with the following error:

```
elasticsearch.exceptions.RequestError: RequestError(400, 'illegal_argument_exception', 'Settings [index.time_series.end_time,index.time_series.start_time,index.routing_path] are not available when running in serverless mode')
```

### Steps to Reproduce

I used a custom Python client script to create an index

```
from elasticsearch import Elasticsearch
import sys
import argparse
import os

if os.environ.get('API_KEY') is None or os.environ.get('ELASTICSEARCH_URL') is None:
    print(f"Missing environment variables 'API_KEY' and 'ELASTICSEARCH_URL'")

api_key = os.environ.get("API_KEY")
elasticsearch_url = os.environ.get("ELASTICSEARCH_URL")

print(f"Using api key: {api_key}")
print(f"Using Elasticsearch url: {elasticsearch_url}")

client = Elasticsearch(
  elasticsearch_url,
  api_key=api_key
)

parser = argparse.ArgumentParser(description='Elasticsearch TSDB indexing')
parser.add_argument('dataset', help='The set of documents to index as a Json file')
parser.add_argument('index', help='The index where data will be indexed')

args = parser.parse_args()

mappings = {
    "settings": {
      "index": {
        "mapping.total_fields.limit": 10000,
        "codec": "default",
        "routing_path": [
          "cloud_region",
          "pod_id"
        ],
        "time_series": {
          "start_time": "2023-09-01T00:00:00",
          "end_time": "2023-09-30T23:59:59"
        }
      }
    },
    "mappings": {
        "properties": {
            "@timestamp": {
                "type": "date"
            },
            "cloud_region": {
                "type": "keyword",
                "time_series_dimension": "true"
            },
            "pod_id": {
                "type": "keyword",
                "time_series_dimension": "true"
            },
            "counter": {
                "type": "integer",
                "time_series_metric": "counter"
            },
            "gauge": {
                "type": "double",
                "time_series_metric": "gauge"
            }
        }
    }
}


delete_response = client.indices.delete(
    index=args.index,
    ignore_unavailable=True
)
print(f"Delete response: {delete_response}")

create_response = client.indices.create(
    args.index,
    body=mappings
)
print(f"Create response: {create_response}")
```

### Logs (if relevant)

_No response_
server/src/main/java/org/elasticsearch/cluster/metadata/IndexMetadata.java
mappingVersion = true;
                            builder.mappingVersion(parser.longValue());
                        }
                        case KEY_SETTINGS_VERSION -> {
                            settingsVersion = true;
                            builder.settingsVersion(parser.longValue());
                        }
                        case KEY_ALIASES_VERSION -> {
                            aliasesVersion = true;
                            builder.aliasesVersion(parser.longValue());
                        }
                        case KEY_ROUTING_NUM_SHARDS -> builder.setRoutingNumShards(parser.intValue());
                        case KEY_SYSTEM -> builder.system(parser.booleanValue());
                        case KEY_MAPPINGS_HASH -> {
                            assert mappingsByHash != null : "no deduplicated mappings given";
                            if (mappingsByHash.containsKey(parser.text()) == false) {
                                throw new IllegalArgumentException("mapping with hash [" + parser.text() + "] not found");
                            }
                            builder.putMapping(mappingsByHash.get(parser.text()));
                        }
                        case KEY_WRITE_LOAD_FORECAST -> builder.indexWriteLoadForecast(parser.doubleValue());
                        case KEY_SHARD_SIZE_FORECAST -> builder.shardSizeInBytesForecast(parser.longValue());
                        default -> throw new IllegalArgumentException("Unexpected field [" + currentFieldName + "]");
                    }
                } else {
                    throw new IllegalArgumentException("Unexpected token " + token);
                }
            }
            XContentParserUtils.ensureExpectedToken(XContentParser.Token.END_OBJECT, parser.nextToken(), parser);
            assert mappingVersion : "mapping version should be present for indices created on or after 6.5.0";