[I] [Bug] [Doc] S3File doc contains wrong param requirement [seatunnel]

[via GitHub]

litiliu opened a new issue, #8802:
URL: https://github.com/apache/seatunnel/issues/8802

   ### Search before asking
   
   - [x] I had searched in the 
[issues](https://github.com/apache/seatunnel/issues?q=is%3Aissue+label%3A%22bug%22)
 and found no similar issues.
   
   
   ### What happened
   
   job fail based on the params provided by the doc. The doc says the 
`file_format_type` is not required, but actually is necessary. 
   
   <img width="762" alt="Image" 
src="https://github.com/user-attachments/assets/6b086b4a-8852-4e35-bf4a-067789208a30";
 />
   
   
   ### SeaTunnel Version
   
   2.3.9
   
   ### SeaTunnel Config
   
   ```conf
   {
     "env": {
       "jobMode": "batch",
       "parallelism": 1,
       "checkpoint.interval": 60000
     },
     "source": [
       {
         "plugin_name": "FakeSource",
         "plugin_output": "fake",
         "row.num": 5,
         "schema": {
           "fields": {
             "name": "string",
             "age": "int",
             "card": "int"
           }
         }
       }
     ],
     "sink":[
       {
         "plugin_name":"S3File",
         "bucket": "s3://bb" ,
         "fs.s3a.endpoint": "",
         "fs.s3a.aws.credentials.provider": 
"org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider",
         "access_key": "a",
         "secret_key": "n",
         "path":"test3.txt",
         "schema_save_mode":"ERROR_WHEN_SCHEMA_NOT_EXIST"
       }
       ]
   }
   ```
   
   ### Running Command
   
   ```shell
   org.apache.seatunnel.example.flink.v2.SeaTunnelApiExample
   ```
   
   ### Error Exception
   
   ```log
   Caused by: 
org.apache.seatunnel.shade.com.typesafe.config.ConfigException$Missing: No 
configuration setting found for key 'file_format_type'
        at 
org.apache.seatunnel.shade.com.typesafe.config.impl.SimpleConfig.findKeyOrNull(SimpleConfig.java:156)
        at 
org.apache.seatunnel.shade.com.typesafe.config.impl.SimpleConfig.findOrNull(SimpleConfig.java:174)
        at 
org.apache.seatunnel.shade.com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:188)
        at 
org.apache.seatunnel.shade.com.typesafe.config.impl.SimpleConfig.find(SimpleConfig.java:193)
        at 
org.apache.seatunnel.shade.com.typesafe.config.impl.SimpleConfig.getString(SimpleConfig.java:250)
        at 
org.apache.seatunnel.connectors.seatunnel.file.sink.config.FileSinkConfig.<init>(FileSinkConfig.java:209)
        at 
org.apache.seatunnel.connectors.seatunnel.file.sink.BaseMultipleTableFileSink.<init>(BaseMultipleTableFileSink.java:71)
        at 
org.apache.seatunnel.connectors.seatunnel.file.s3.sink.S3FileSink.<init>(S3FileSink.java:58)
        at 
org.apache.seatunnel.connectors.seatunnel.file.s3.sink.S3FileSinkFactory.lambda$createSink$0(S3FileSinkFactory.java:115)
        at 
org.apache.seatunnel.core.starter.flink.execution.SinkExecuteProcessor.execute(SinkExecuteProcessor.java:141)
        at 
org.apache.seatunnel.core.starter.flink.execution.FlinkExecution.execute(FlinkExecution.java:115)
        at 
org.apache.seatunnel.core.starter.flink.command.FlinkTaskExecuteCommand.execute(FlinkTaskExecuteCommand.java:61)
        ... 2 more
   ```
   
   ### Zeta or Flink or Spark Version
   
   _No response_
   
   ### Java or Scala Version
   
   _No response_
   
   ### Screenshots
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [x] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [x] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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