[Improvement] Use ShuffleSegment to replace BufferSegment and FileBasedShuffleSegment

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

### Search before asking

- [X] I have searched in the [issues](https://github.com/apache/incubator-uniffle/issues?q=is%3Aissue) and found no similar issues.

### What would you like to be improved?

Now the BufferSegment class and FileBasedShuffleSegment class both six fields, represents a segment.
```java
private long blockId;
private long offset;
private int length;
private int uncompressLength;
private long crc;
private long taskAttemptId;
```
To add a new ShuffleSegment to replace these two class can make the code easier to maintain.

### How should we improve?

To simplify the code.

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

Start by locating BufferSegment and FileBasedShuffleSegment and all of their usages. Compare how their six fields are constructed and consumed, then identify the existing segment-related tests. Done means both classes are replaced by ShuffleSegment without changing segment behavior and the relevant tests pass.

Written by the indexing model from the issue text.