Improve the ush/hafs_runcmd.sh.inc command variable defines

[BinLiu-NOAA]

Description

Provide a clear and concise description of the requested feature/capability. From NCO SPA: Please look into to improve the ush/hafs_runcmd.sh.inc command variable defines at the next upgrade.

for example - APRUNF=${APRUNF:-"mpiexec -n ${TOTAL_TASKS} cfp "} APRUNCFP=${APRUNCFP:-"mpiexec"}

This will allow the APRUN* variable could be re-defined as needed in each job.

Proposed solution

How should the new feature/capability be added? If you have thoughts on the implementation strategy, please share them here.

Status (optional)

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Related to (optional)

Directly reference any related issues or PRs in this or other repositories, and describe how they are related. Examples:

• fixed by hafs-community/hafs/pull/<pr_number>