🚀[FEA]: Better handling of the static dataset in GraphCast

[mnabian]

Is this a new feature, an improvement, or a change to existing functionality?

Improvement

How would you describe the priority of this feature request

Medium

Please provide a clear description of problem you would like to solve.

Currently the static dataset is handled in the init method of the GraphCast model. A This can be better handled by getting the static data from the dataloader instead.

Describe any alternatives you have considered

No response