feat: add mindspore-version CLIP (rewritten based on openAI-CLIP)

[XixinYang]

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• [x] You have read the Contributing Guidelines on pull requests
• [x] Your code builds clean without any errors or warnings
• [x] You are using approved terminology
• [ ] You have added unit tests

Motivation

Add mindspore-version CLIP which is totally rewritten based on openAI-CLIP.

Test Plan

These code have been tested on the first example in ./README.md with both ViT and ResNet ckpts, which has used all the main APIS, and the result differences are as below: ViT: ResNet: After discussion, all the diffences are considered within an acceptable range.

Related Issues and PRs

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[SamitHuang]

As a text-image alignment foundation mode, CLIP is not appropriate to place in examples. We can put it under mindone

[SamitHuang]

As a text-image alignment foundation mode, CLIP is not appropriate to place in examples. We can put it under mindone

Take back by words. Let MindCV be its root.

[XixinYang]

TODO: add an API check list in a susquent PR.

[XixinYang]

TODO：Compare with the original CLIP paper on the zero-shot and linear-probe ACC (imagenet)

[XixinYang]

TODO: add an API check list in a susquent PR.

done