[Bug] [connectors-sftp] When using SFTP for synchronization, if there are a large number of files in the directory, performance issues will occur.

### 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

在文件同步的 connectors 中，有个查询文件的方法org.apache.seatunnel.connectors.seatunnel.file.source.reader.AbstractReadStrategy.getFileNamesByPath ,
FileStatus[] stats = hadoopFileSystemProxy.listStatus(path);
有两个问题
1. 目录中有大批量文件时， 会用到 getWorkingDirectory 方法， 这个方法，每次都会创建一个connect ，然后 获取 homeDir， 是否可以使用类变量的方式，毕竟 根目录不会改变，profiler 分析如下

测试的同步作业有 4000 个文件， 记录时间内，92 的开销都在这里。
2. 文件过滤，如果有 file_filter_pattern 配置，应该将这个过滤前置到最开始的位置，避免更大的内存开销。

### SeaTunnel Version

2.3.11

### SeaTunnel Config

```conf
ignore
```

### Running Command

```shell
ignore
```

### Error Exception

```log
none
```

### 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)