Fix HIP and HIPRTC Python bindings for correctness, add missing APIs …

[cjatin]

…and tests

Built with Claude (claude-4.6-opus) via Cursor.

hip.py:

• Rewrite hipDeviceProperties struct to match hipDeviceProp_tR0600 layout (100+ fields reordered/added including hipUUID, hipDeviceArch, arrays)
• Use hipGetDevicePropertiesR0600 symbol to match C++ macro redefinition
• Fix hipMemoryType enum values (hipMemoryTypeArray=10, Unified=11, add Unregistered=0, Managed=3)
• Fix hipPointerAttributes struct (add isManaged, allocationFlags; rename memoryType to type)
• Fix hipMallocPitch to treat pitch as output parameter
• Fix hipError to handle string arguments without crashing
• Add argtypes for hipPointerGetAttributes, hipMemGetInfo, hipEventCreateWithFlags (c_uint for flags)
• Clean up hipModuleLaunchKernel (remove dead code, rename params)
• Add 16 missing error codes to knownExceptions

hiprtc.py:

• Fix hiprtcGetProgramLog/hiprtcGetCode to use create_string_buffer instead of writing into immutable Python bytes objects
• Fix hiprtcCheckStatus crash on unknown error codes
• Fix hiprtcGetErrorString to return decoded string
• Add HIPRTC_ERROR_LINKING=100 to knownExceptions
• Add missing API bindings: hiprtcVersion, hiprtcGetLoweredName, hiprtcGetBitcode/hiprtcGetBitcodeSize

tests:

• Add test_device_management.py (hipInit, Get/SetDevice, Synchronize)
• Add test_device_properties.py (21 field validations)
• Add test_memory_advanced.py (MemGetInfo, MallocPitch, PointerAttributes)
• Add test_event_flags.py (flag variants, timing-disabled events)
• Add test_module.py (load/unload, get function, kernel launch, streams)
• Add test_error_handling.py (error class, known/unknown codes, strings)

Made-with: Cursor