[BUG] Failed to convert date type field with epoch format

[chloe-zh]

Describe the bug
Date field with epoch format (epoch-millis, epoch-second etc.) failed with message: Construct ExprTimestampValue from "1623267788498" failed, unsupported date format.

To Reproduce

PUT testdata/_mapping
{
    "properties": {
      "date": {
        "type":   "date",
        "format": "epoch_millis"
      }
    }
}
PUT testdata/_bulk
{"index":{"_id":"1"}}
{"date":1420070400001}
POST _opendistro/_sql
{
  "query": "select * from testdata"
}

Expected behavior

{
  "schema": [{
    "name": "date",
    "type": "date"
  }],
  "total": 1,
  "datarows": [["2015-01-01 00:00:00.001"]],
  "size": 1,
  "status": 200
}

Plugins
SQL

Screenshots
NA

Host/Environment (please complete the following information):
NA

Additional context
NA

[chloe-zh]

Another issue that is related to incompatible format of date and time type data: #126