[API Compatibility] Add function alias for Dataset, IterableDataset and ConcatDataset

[algorithm1832]

PR Category

User Experience

PR Types

Improvements

Description

• Copy code from paddle.io to paddle.utils.data
• Add unittests

Used AI Studio

---

Notes:

• In unittests, TestTensorDataset failed due to tensor shape mismatch (but it has nothing to do with this PR)
• New apis' EN docs should be made easy (with a link to the original API doc), but I am not sure so no changes made
• I can only copy code to add function alias. If I use import, a circular import problem will raise, because paddle.base imports function from utils, and the dataset classes in paddle.io import paddle.base

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[zhwesky2010]

这个与原来的实现的关系是？

这个需要只保留一份，另外一份作为别名使用。

保持代码复用，避免维护两套代码。

[algorithm1832]

实际上是函数别名，理论上在此处直接import就可以，不需要额外代码

但是直接import会出现循环依赖（现在这份代码其实也存在循环依赖，还在排查）

直接import出现循环依赖的原因是：paddle.base初始化的时候，会调用utils里面的一个函数，但utils里面import Dataset会进一步import paddle.base，从而导致循环依赖

[codecov-commenter]

Codecov Report

❌ Patch coverage is 40.74074% with 32 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@4719302). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
python/paddle/utils/data/dataset.py	40.00%	30 Missing ⚠️
python/paddle/io/dataloader/dataset.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #77212   +/-   ##
==========================================
  Coverage           ?   40.74%           
==========================================
  Files              ?        3           
  Lines              ?       54           
  Branches           ?        0           
==========================================
  Hits               ?       22           
  Misses             ?       32           
  Partials           ?        0           

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[zhwesky2010]

这个可能得设计一下这个import关系，比如解耦一些依赖。

[algorithm1832]

utils可能需要重构，短时间内无法完成本PR涉及的API兼容性工作