Limited-area transforms on GPU#279

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ddegrauwe wants to merge 23 commits intoecmwf-ifs:developfrom

ddegrauwe:degrauwe_lam_gpu

Commits on Jun 16, 2025

Commits on Jun 17, 2025

WIP. Fixed CMakeLists.txt to fix gpu compilation. Modified hicfft to identify meridional transform through negative kfields.
ddegrauwe
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Commits on Jun 18, 2025

fixes
ddegrauwe
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Commits on Jun 20, 2025

WIP: CRASHES WITH SIGSEGV. Using constant-address arrays for fft (necessary for graphs).
ddegrauwe
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