[Feature] Support iTPN and HiViT

[fangyixiao18]

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Motivation

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Modification

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BC-breaking (Optional)

Does the modification introduce changes that break the backward compatibility of the downstream repositories?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

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Checklist

Before PR:

• Pre-commit or other linting tools are used to fix the potential lint issues.
• Bug fixes are fully covered by unit tests, the case that causes the bug should be added in the unit tests.
• The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, like docstring or example tutorials.

After PR:

• If the modification has potential influence on downstream or other related projects, this PR should be tested with those projects, like MMDet or MMSeg.
• CLA has been signed and all committers have signed the CLA in this PR.

[CLAassistant]

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[codecov]

Codecov Report

Patch coverage: 45.04% and project coverage change: -1.01 ⚠️

Comparison is base (f9dcae2) 68.16% compared to head (8b31f14) 67.16%.

❗ Current head 8b31f14 differs from pull request most recent head 1fc8d5c. Consider uploading reports for the commit 1fc8d5c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1584      +/-   ##
==========================================
- Coverage   68.16%   67.16%   -1.01%     
==========================================
  Files         295      307      +12     
  Lines       23372    24505    +1133     
  Branches     3713     3880     +167     
==========================================
+ Hits        15932    16459     +527     
- Misses       6880     7451     +571     
- Partials      560      595      +35     

Flag	Coverage Δ
unittests	67.16% <45.04%> (-1.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmpretrain/apis/image_retrieval.py	21.42% <ø> (ø)
mmpretrain/datasets/__init__.py	70.27% <0.00%> (-4.02%)	⬇️
mmpretrain/datasets/gqa_dataset.py	0.00% <0.00%> (ø)
mmpretrain/datasets/nocaps.py	0.00% <0.00%> (ø)
mmpretrain/datasets/scienceqa.py	0.00% <ø> (ø)
mmpretrain/models/multimodal/__init__.py	40.00% <0.00%> (-4.45%)	⬇️
...retrain/models/multimodal/chinese_clip/__init__.py	0.00% <0.00%> (ø)
mmpretrain/models/multimodal/chinese_clip/bert.py	0.00% <0.00%> (ø)
...ain/models/multimodal/chinese_clip/chinese_clip.py	0.00% <0.00%> (ø)
mmpretrain/models/multimodal/chinese_clip/utils.py	0.00% <0.00%> (ø)
... and 22 more

... and 2 files with indirect coverage changes

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