[feat]IBA:demosaic add white balancing #6769

Job	Run time
macos-13 appleclang14/C++17 py3.11 MacOS-13-Intel	22m 17s
macos-14 appleclang15/C++20 py3.12 MacOS-14-ARM	12m 33s
macos-15 appleclang16/C++20 py3.13 MacOS-15-ARM	9m 58s
VFX2021 gcc9/C++17 py3.7 exr3.1 ocio2.0	13m 50s
VFX2021 clang10/C++17 avx2 exr3.1 ocio2.0	8m 16s
VFX2022 gcc9/C++17 py39 exr3.1 ocio2.1	13m 22s
Ubuntu latest releases gcc13 C++20 py3.12 avx2 exr3.3 ocio2.4	10m 45s
VFX2022 clang13/C++17 py39 avx2 exr3.1 ocio2.1	14m 1s
Ubuntu bleeding edge gcc14 C++20 py3.12 OCIO/libtiff/exr-main avx2	8m 54s
VFX2022 icc/C++17 py3.9 exr3.1 ocio2.1 qt5.15	13m 23s
Ubuntu all local builds gcc12 C++17 avx2 exr3.2 ocio2.3	13m 46s
VFX2022 icx/C++17 py3.9 exr3.1 ocio2.2 qt5.15	13m 34s
Ubuntu clang14 C++20 avx2 exr3.1 ocio2.1	14m 2s
VFX2024 sanitizers	38m 53s
Ubuntu debug gcc9/C++17, sse4.2, exr3.1	16m 30s
VFX2023 gcc11/C++17 py3.10 exr3.1 ocio2.2	12m 30s
Ubuntu static libs gcc9 C++17 exr2.4	13m 25s
VFX2024 gcc11/C++17 py3.11 exr3.2 ocio2.3	11m 13s
windows-2019 VS2019	51m 35s
Ubuntu clang-format	5m 21s
VFX2021 oldest gcc9.3/C++17 py3.7 exr-3.1	9m 50s
windows-2022 VS2022	49m 5s
VFX2021 hobbled gcc9.3/C++17 py3.7 exr-3.1 no-sse	10m 27s
VFX2023 abi check	7m 53s
	6h 35m 23s

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