Link initial conditions instead of copying in stage_ic

[aerorahul]

What new functionality do you need?

It was reported that the stage_ic job takes much longer to copy initial conditions when running the coupled model in an ensemble configuration. This is done in the stage_ic job.

A feature was introduced in FileHandler of wxflow to allow link in addition to copy. This feature should be leveraged to speed up the staging of initial conditions in the stage_ic job. Since staging is not an operational job, linking should not be an EE2 violation.

What are the requirements for the new functionality?

Replaces copy w/ link to speed up the execution of stage_ic

Acceptance Criteria

• Successfully links the required initial conditions (instead of copy)
• Runs the model from these linked ICs.
• Does not need increase in wall time for stage jobs

Suggest a solution (optional)

• Update the hash of wxflow to bring in the link feature
• Replace copy w/ link in the stage_ic yamls