Fix Julia compilation error when using IFT in a singularity container

[tdivoll]

This PR attempts to fix the problem behavior when running a Cylc flow on Oscar, the landmask task throws an error when trying to use Julia in the Docker image.

ERROR: LoadError: IOError: mkdir("/.julia"; mode=0o777): read-only file system (EROFS)

I also made a few small updates for some Cylc tasks for maintenance. After the Oscar upgrade, preprocess seemed to fail OOM so I used the --mem-per-cpu flag to make sure the task doesn't die. I will make updates to the tracker task in a separate PR (see #103).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2927f54) 94.88% compared to head (a3b5afd) 94.88%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #100   +/-   ##
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  Coverage   94.88%   94.88%           
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  Files           7        7           
  Lines         215      215           
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  Hits          204      204           
  Misses         11       11           

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[broarr]

This looks good to me. I noticed that you changed the Julia version as well as adding the environment variable. Was the change to the Julia version not enough on its own?

[tdivoll]

This looks good to me. I noticed that you changed the Julia version as well as adding the environment variable. Was the change to the Julia version not enough on its own?

I does still throw the error even with the Julia version pinned, so it seems like the issue is not from a Julia update. Would it be best to go back to v1.9 rather than pinning Julia?