### 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>
### What changes were proposed in this pull request?
To support Spark 4.0.0 preview.
### Why are the changes needed?
1. Changed Scala to 2.13.
2. Introduce columnar shuffle module for spark 4.0.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Cluster test.
Closes#2813 from FMX/b1413.
Authored-by: mingji <fengmingxiao.fmx@alibaba-inc.com>
Signed-off-by: Shuang <lvshuang.xjs@alibaba-inc.com>
### What changes were proposed in this pull request?
Introduce `spark-3.5-columnar-shuffle` module to support columnar shuffle for Spark 3.5.
### Why are the changes needed?
#1850 does not support columnar shuffle for Spark 3.5, in which version building `spark-3-columnar-shuffle` module has compilation error. The compilation error is caused by https://github.com/apache/spark/pull/40784, which incompatible changes move `InternalType` from `AtomicType` to `PhysicalDataType`.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
CI.
Closes#2710 from SteNicholas/CELEBORN-912.
Authored-by: SteNicholas <programgeek@163.com>
Signed-off-by: xiyu.zk <xiyu.zk@alibaba-inc.com>
### What changes were proposed in this pull request?
Unifiy license format of `pom.xml`.
### Why are the changes needed?
There are different license formats among modules, which standard license format has indent before `~`.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
No.
Closes#2408 from SteNicholas/maven-license-format.
Authored-by: SteNicholas <programgeek@163.com>
Signed-off-by: Shuang <lvshuang.xjs@alibaba-inc.com>
### What changes were proposed in this pull request?
Move Columnar Shuffle code into an individual module
### Why are the changes needed?
Spark 3.5 made a lot of changes to AtomicType in https://issues.apache.org/jira/browse/SPARK-42887.
This causes compilation error when building columnar shuffle code.
As columnar shuffle is a configurable feature, I think it's better to move related code into a individual module. Then we can exclude this module when build with Spark 3.5 for now.
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
Add test `ColumnarHashBasedShuffleWriterSuiteJ` and `CelebornColumnarShuffleReaderSuite`
Closes#1843 from zhouyifan279/columnar-shuffle.
Authored-by: zhouyifan279 <zhouyifan279@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>
