Run model as compressed/uncompressed mode (#34719)
* draft, run model as compreszed/uncompressed mode
* draft
* run run_compressed=False
* run_compressed as attr
* set run_compressed=False using quantization_config
* remove redundant line
* make is_qat_trainable dependent on run_compressed status
* add tests
* lint
* full in docstring
* add decompress
* comments
* decompress if model is compresssed and not run_compressed
* apply_quant_config logic fix -- populate statedict properly
* comments
* remove non compressed model
* make is_compressed as property
* cosmetic
* run apply_quant_config for non-compressed models -- popualte scales and zeropoints
* add pahtway for decompressing sparse models
* typo on is_quantization_compressed
* lint
* fix typo
