Scalable-friendly dct-inl.h #10990

Job	Run time
Conformance Build AVX3	1m 45s
Warmup caches	25s
Conformance Build AVX2	1m 59s
Conformance Build SSE4	1m 18s
Conformance Build SSSE3	1m 17s
Conformance Build EMU128	1m 1s
Conformance Build SCALAR	1m 13s
Conformance Build SCALAR_ASAN	1m 27s
Conformance Test main_level5 on AVX3	57s
Conformance Test main_level5 on AVX2	53s
Conformance Test main_level5 on SSE4	59s
Conformance Test main_level5 on SSSE3	1m 1s
Conformance Test main_level5 on EMU128	48s
Conformance Test main_level5 on SCALAR	1m 2s
Conformance Test main_level5 on SCALAR_ASAN	1m 17s
Conformance Test main_level10 on AVX3	1m 12s
Conformance Test main_level10 on AVX2	59s
Conformance Test main_level10 on SSE4	51s
Conformance Test main_level10 on SSSE3	59s
Conformance Test main_level10 on EMU128	51s
Conformance Test main_level10 on SCALAR	1m 4s
Conformance Test main_level10 on SCALAR_ASAN	1m 22s
	24m 40s

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