Free functions for texturing, point clouds, and trace #3684

Job	Run time
macos-13 C++17 py3.11 MacOS-13 llvm17	8m 5s
Ubuntu Debug gcc7/C++17 llvm9 py3.7 oiio2.3 exr2.4 sse4 exr2.4	3m 45s
macos-14 C++17 py3.11 MacOS-14-ARM llvm17	3m 17s
VFX2021 gcc9/C++17 llvm11 py3.7 exr2.5 oiio2.3 sse4 batch-b8avx2	5m 29s
Ubuntu gcc10/C++17 llvm10 oiio-release exr2.5 avx2	3m 6s
VFX2022 gcc9/C++17 llvm13 py3.9 exr3.1 oiio-rel avx2	5m 17s
Ubuntu latest releases gcc11/C++17 llvm16 exr3.2 py3.9 avx2 batch-b16avx512	9m 49s
VFX2022 clang12/C++17 llvm12 oiio-master exr3.1 py3.9 avx2 batch-avx512	9m 12s
Ubuntu bleeding edge gcc12/C++17 llvm17 oiio/ocio/exr/pybind-master py3.10 avx2 batch-b16avx512	11m 52s
VFX2022 icc/C++17 llvm14 py3.9 exr3.1 oiio-master avx2	14m 52s
Ubuntu clang14/C++17 llvm14 exr3.1 py3.8 avx2 batch-b16avx512	13m 59s
VFX2022 icx/C++17 llvm14 py3.9 exr3.1 oiio2.3 avx2	9m 15s
Ubuntu clang-format	4m 13s
VFX2023 gcc11/C++17 llvm15 py3.10 exr3.1 oiio-rel avx2	6m 42s
VFX2023 GPU Cuda11 gcc11/C++17 llvm15 py3.10 exr3.1 OIIO-master avx2	4m 11s
VFX2021 oldest everything gcc9/C++17 llvm9 py3.7 oiio2.3 no-simd exr2.4	4m 26s
VFX2022 sanitizers	7m 9s
VFX2023 abi check	5m 55s
	2h 10m 34s

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