added wandb.run_id to allow resuming without wandb log; updated log m…

[liuhuanjim013]

This allows passing in wandb run_id from cli when resuming training without wandb log.

[liuhuanjim013]

This use case came up when I tried to train a model on colab, but the colab runtime got killed and I lost the wandb logs.

[aliberts]

@liuhuanjim013 Could you run pre-commits to fix formating? LGTM otherwise

[liuhuanjim013]

@liuhuanjim013 Could you run pre-commits to fix formating? LGTM otherwise

thanks @aliberts ! done!