Move to the python way to do sweeps

[manuel-delverme]

This will allow to support in-config configuration space definition and to stop using the retarded natural log scale in the sweep, log scale in the UI that wandb doesn't want to fix

import wandb

sweep_config = {
  "method": "bayes",
  "metric": {
    "name": "val_sharpe",
    "goal": "maximize"
  },
  "parameters": {
    "epochs": {
      "values": [1, 2]
    },
    "learning_rate": {
      "min": 0.001,
      "max": 0.01
    },
    "batch_size": {
      "values": [128, 256]
    }
  }
}

sweep_id = wandb.sweep(sweep_config, project='XXXX')