GPU: Some maintenance, and use <array> for CUDA / ROCm, but not yet for OpenCL

[davidrohr]

• Renames some misleading flags
• Switches CUDA / ROCm to use instead of GPUCommonArray
• Prepare to get rid of GPUCommonTypeTraits and GPUCommonArray once this is possible in OpenCL.
• Contains already some code to use type_traits in OpenCL, which mostly workd, but it turns out pulled in from <type_traits> has typedefs colliding with opencl-c-stdinc.h. Filed a bug report to clang. Let's see. If we are unlucky, these are just incompatible specifications...

[github-actions]

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[alibuild]

Error while checking build/O2/fullCI_slc9 for ca81641 at 2025-05-15 23:30:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackextension.cxx:137:24: error: 'array' is not a member of 'o2::gpu::gpustd'; did you mean 'std::array'?
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackextension.cxx:137:30: error: expected primary-expression before 'float'
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackextension.cxx:138:151: error: 'dcaInfo' was not declared in this scope; did you mean 'scanf'?
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackPropagation.cxx:165:16: error: 'array' in namespace 'o2::gpu::gpustd' does not name a template type
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackPropagation.cxx:207:11: error: 'mDcaInfo' was not declared in this scope; did you mean 'mDcaInfoCov'?
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackPropagation.cxx:243:168: error: 'mDcaInfo' was not declared in this scope; did you mean 'mDcaInfoCov'?
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackPropagation.cxx:251:168: error: 'mDcaInfo' was not declared in this scope; did you mean 'mDcaInfoCov'?
/sw/SOURCES/O2Physics/14277-slc9_x86-64/0/Common/TableProducer/trackPropagation.cxx:296:21: error: 'mDcaInfo' was not declared in this scope; did you mean 'mDcaInfoCov'?
ninja: build stopped: subcommand failed.

Full log here.