FTorch component should be ToplevelRequired

[Katetc]

Brief summary of bug

I am testing the externals for the new ifx compiler (currently cesm3_0_alpha08l, but that could change) in CISM-Wrapper. The CDEPs component (cdeps1.0.93) complained that it couldn't build without FTorch. When I copied the .gitmodules file from CESM that included the FTorch component, the line "ToplevelOptional" is used. This did not fix the build error because git-fleximod didn't check out FTorch in CISM-wrapper if it's optional. So, I think, with this CDEPs tag, we should update the .gitmodules file to make FTorch required.

General bug information

CESM version you are using: cesm3_0_alpha08l externals with CISM-Wrapper

Machine you are using: Derecho

Have you modified the code? (If so, please point us to you changes.): I mean, no, kinda?

Details of bug

See above.

[fischer-ncar]

@Katetc Can you give me a test that's failing. I've tried a couple and didn't have any issues building without FTorch.