Remove REPLAY_ICS and other related variables from develop

[EricSinsky-NOAA]

What is wrong?

The REPLAY_ICS conditionals in the develop branch are adding unnecessary complexity to the global-workflow. The REPLAY_ICS variable is needed for the GEFS reforecast, but since the GEFS reforecast now has its own branch, there is no need to keep the REPLAY_ICS and other similar variables related to replay ICs in the develop branch.

What should have happened?

The REPLAY_ICS and other similar variables should be removed from the develop branch to reduce any unnecessary complexities in the global-workflow related to replay ICs.

What machines are impacted?

All or N/A

What global-workflow hash are you using?

3d6c13e

Steps to reproduce

1. Set up any global-workflow experiment and run any experiment.
2. The workflow will likely have to go through REPLAY_ICS conditional statements during the experiment set up and run. This can contribute to more lengthy log files and consequently more difficult debugging.

Additional information

No response

Do you have a proposed solution?

Remove REPLAY_ICS variables from all relevant scripts. Also, remove any files that are only used when REPLAY_ICS is set (e.g. diag_table_replay). The replay IC CI test may no longer be needed either.