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

* Fix tests.

* fix opt's cmd for sparse model

* add hardware

* Remove redundant functions and adjust tests' file

* Remove redundant functions and adjust tests' file

* add op predictors for unknown operators

* modify the dowload path of op predictors and opt tools

* add automatic download mode for opt tools

* modify predictor's test files

* modify predictor's test file

* modify predictor's test file

* modify predictor's test files

* add requirements for installing sklearn

* modify predicor's test files

* modify predictor's test files

* modify predictor's test files

* modify predictor's test files

* modify predictor's test files

* Modify api design

* update LatencyPredictor's doc.

* update LatencyPredictor's test files

* update LatencyPredictor's test files

* update LatencyPredictor's test files

* update LatencyPredictor's test files

* update LatencyPredictor's doc.

* update LatencyPredictor's doc.

* update LatencyPredictor's doc.

* update some syntax

* add LatencyPredictor's api doc.

* update LatencyPredictor's doc.

* update LatencyPredictor's api doc.

* adjust \'predictor_state\' api

* update LatencyPredictor's test files
Co-authored-by: NminghaoBD <79566150+minghaoBD@users.noreply.github.com>