1. Remove fluid
2. Remove unused codes
2.1 remove adabert
2.2 remove ddpg controller of NAS
2.3 remove paddleslim.models
2.4 Remove PC-DARTS

* Add ViT demo for ACT

* update
Co-authored-by: Nceci3 <ceci3@users.noreply.github.com>

* [ACT] Rename 'Quantization' to 'QuantAware'.

* Fix examples.

* Fix tests.

* add qdrop to ACT.

* Add tests for ACT.

* Adjust example of PTQ&HPO.

* Add readme for QuantPost.

* update docs

* fix docs

* add unittest

* fix ptq hpo in ac

* judge model type only when compress_config is None

* update

* update demo

* revert compressor

Co-authored-by: NGuanghua Yu <742925032@qq.com>

Co-authored-by: Nceci3 <ceci3@users.noreply.github.com>