[Bug] [seatunnel-translation] seatunnel-translation-base test dependencies introduce unrelated connector modules into incremental IT builds

### 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

For CI optimization, one potential problem was identified as follows.

`seatunnel-translation-base` currently includes `connector-file-base` and `connector-doris` as test dependencies for ParallelSourceTest.

This causes unrelated connector incremental IT jobs to pull these modules into the Maven reactor through the shared translation -> starter -> e2e dependency chain.

As a result, changes in an unrelated connector such as `connector-elasticsearch-v2` may still trigger unnecessary build steps for `connector-file-base` or `connector-doris`, increasing CI cost and noise.

The root cause is that connector-specific test dependencies were added to a shared base module. ParallelSourceTest should verify the common split assignment behavior without depending on concrete connector implementations.

### SeaTunnel Version

2.3.13

### SeaTunnel Config

```conf
None
```

### Running Command

```shell
None
```

### Error Exception

```log
None
```

### Zeta or Flink or Spark Version

Zeta

### Java or Scala Version

Java 1.8

### Screenshots

### 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)