Extract CI deps installation into script #11373

Job	Run time
Conformance Build AVX3	1m 9s
Warmup caches	27s
Conformance Build AVX2	47s
Conformance Build SSE4	53s
Conformance Build SSSE3	59s
Conformance Build EMU128	47s
Conformance Build SCALAR	1m 4s
Conformance Build SCALAR_ASAN	1m 13s
Conformance Test main_level5 on AVX3	50s
Conformance Test main_level5 on AVX2	1m 5s
Conformance Test main_level5 on SSE4	1m 8s
Conformance Test main_level5 on SSSE3	51s
Conformance Test main_level5 on EMU128	1m 4s
Conformance Test main_level5 on SCALAR	1m 0s
Conformance Test main_level5 on SCALAR_ASAN	1m 27s
Conformance Test main_level10 on AVX3	56s
Conformance Test main_level10 on AVX2	48s
Conformance Test main_level10 on SSE4	59s
Conformance Test main_level10 on SSSE3	1m 0s
Conformance Test main_level10 on EMU128	58s
Conformance Test main_level10 on SCALAR	1m 0s
Conformance Test main_level10 on SCALAR_ASAN	1m 32s
	21m 57s

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