Add testmods for E3SMv2-Arctic configuration#13

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darincomeau wants to merge 2 commits intoE3SMv2-Arcticfrom

add-v2arctic-testmods

Commits on Mar 29, 2022

Adding testmods for E3SMv2-Arctic configuration
darincomeau
committed

Commits on Mar 30, 2022

Replacing hard paths with DIN_LOC_ROOT; sea ice namelist cleanup
darincomeau
committed