including optimizer states cpu offload, uses AdamW optimizer and WarmupLR scheduler and will enable mixed
precision training if --fp16 is passed:
```json
{
    "fp16": {
        "enabled": "auto",
        "loss_scale": 0,
        "loss_scale_window": 1000,
        "initial_scale_power": 16,
        "hysteresis": 2,
        "min_loss_scale": 1
    },
"optimizer": {
    "type": "AdamW",
    "params": {
        "lr": "auto",
        "betas": "auto",
        "eps": "auto",
        "weight_decay": "auto"
    }
},
"scheduler": {
    "type": "WarmupLR",
    "params": {
        "warmup_min_lr": "auto",
        "warmup_max_lr": "auto",
        "warmup_num_steps": "auto"
    }
},
"zero_optimization": {
    "stage": 2,
    "offload_optimizer": {
        "device": "cpu",
        "pin_memory": true
    },
