Upgrade compilers to Intel 2021+

[DavidHuber-NOAA]

The global workflow and subcomponents need to have their compilers upgraded to Intel 2021+ OneAPI compilers. Months ago, when I tested this on a non-NOAA GCP cloud instance, compiling with Intel 2021.2 resulted in some cases where the EnKF recentering utility would freeze at C192 ensemble resolution. I was unable to diagnose the issue at the time, but I have seen similar behavior in the GSI when attempting to allocate enormous amounts of memory (~200GB) for a single array, so if the issue is still present, looking for large allocations may be a place to start (also possible that this was just an issue with GCP alone).

[DavidHuber-NOAA]

@hu5970 @aerorahul Do you know a straightforward method for testing this repository? I could run the appropriate global workflow jobs with Intel 18 and 2021 then compare outputs, but I'm sure I would be missing some components.

[aerorahul]

@DavidHuber-NOAA
Sadly no.
These utilities have been developed for use in the workflow in an end-to-end application. They are tested in the cycled DA application.
Tagging @RussTreadon-NOAA @dtkleist if they can identify a POC for testing these GSI utilities for the updates.

[RussTreadon-NOAA]

This repository, to my knowledge, has no code manager nor regression (ctest) tests. Cloning it as part of the g-w install, updating the GSI-utils build to intel/2021+, and exercising utilities in a g-w cycled test sounds like a reasonable first order test. As @DavidHuber-NOAA points out this approach will not test all applications in this repository. Only those exercised by g-w will be tested.

[DavidHuber-NOAA]

I'm combining this effort with #18. Closing.