### What changes were proposed in this pull request?
This PR partially reverts the change of https://github.com/apache/celeborn/pull/2813, namely, restores the renaming of `celeborn-client-spark-3`
### Why are the changes needed?
The renaming is not necessary, and might cause some confusion, for example, I wrongly interpreted the `spark-3-4` as Spark 3.4, it also increases the backport efforts for branch-0.5
### Does this PR introduce _any_ user-facing change?
No, it's dev only, before/after this change, the end users always use the shaded client
```
celeborn-client-spark-2-shaded_2.11-0.6.0-SNAPSHOT.jar
celeborn-client-spark-3-shaded_2.12-0.6.0-SNAPSHOT.jar
celeborn-client-spark-4-shaded_2.13-0.6.0-SNAPSHOT.jar
```
### How was this patch tested?
Pass GA.
Closes#3133 from pan3793/CELEBORN-1413-followup.
Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: mingji <fengmingxiao.fmx@alibaba-inc.com>
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