add transformyuv444 and rgba8888 to yuv444 conversion using rvv#341

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lhpqaq wants to merge 5 commits intogoogle:mainfrom lhpqaq:rvv2

+703-113

Commits on Dec 2, 2024

Yuv color gamut conversion and transformYuv420 using Risc-V Vector
lhpqaq
committed

Commits on Dec 4, 2024

Reusing duplicate code in unit testing and coeffs
lhpqaq
committed

Commits on Dec 9, 2024

Add transformYuv444 for Risc-V Vector
lhpqaq
committed

Commits on Dec 17, 2024

Add ConvertRgba8888ToYuv444 without store
lhpqaq
committed

Commits on Dec 18, 2024

Finish ConvertRgba8888ToYuv444 without test
lhpqaq
committed