Reservoir SST local training, sweep, and wandb validation

[frodre]

Add validation specific to the SST reservoir training along with wanb logging and the capability to update configuration via wandb (for sweeps). Also add sweep initialization, job submission, and configuration scripts.

Example wandb sweep Example wandb training validation

Refactored public API:

• ReservoirTrainingConfig now takes two more flags:
  • mask_readout: option to mask readout alongside reservoir input if mask_field is present in the data
  • validate_sst_only: enables the SST-specific wandb validation instead of the validation used for the atmospheric reservoir
• Transformer paths in the config can now be remote paths
• fv3fit.dump can now dump to remote paths even when subcomponents are not remote compatible

Significant internal changes:

• Adds a set state method to the reservoir for usage in testing/notebooks

• [ ] Tests added

Coverage reports (updated automatically):