feat: Bump to C++20 and update TPLs

[victorapm]

• Move minimal supported C++ standard from C++17 to C++20
• Update TPLs (hypre 3.2.0, hypredrive, VTK 9.7, RAJA suite 2026, fmt 12) and update geos codebase accordingly
• Add ROCm build-only (no executed tests) to CI testing
• Bump blt to 0.7.2
• Fix various CMake warnings
• Fix memory leaks involving hypre's MGR

Depends on GEOS-DEV/thirdPartyLibs#361
Depends on GEOS-DEV/LvArray#356

[jafranc]

Great work @victorapm

It start having quite some patch for this or that compiler depending on the version. Would it worth having a page in the doc stating those ?

[victorapm]

Thanks, Jacques! You mean the checks on the vtk version? If so, I think we can remove those and just support the path for the newest version (9.7.0)

[jafranc]

Though VTK is bumpy in its version, I was more refering to

• gcc12.0 giving this warning explicitly altered by flags in CMake (because of vtk IIRC)
• clang22+ giving that warning explicitly altered

Just trying to keep an explicit track eventhough CMake handles this silently.

[rrsettgast]

@victorapm I merged the dependent PR's. Update the LvArray hash to LvArray/develop and you are ready to go.

[victorapm]

Needs code owner reviews and we're ready to merge

[bd713]

Thanks, @victorapm