[Feature] add model script, training recipe and training weights of DeiT

[TamirBaydasov]

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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 DeiT model script, configs and pre-trained weights

Test Plan

Please refer to "configs/deit/README.md" for testing

Related Issues and PRs

Related Issue: https://github.com/mindspore-lab/mindcv/issues/238