Extract CI deps installation into script #11371

Job	Run time
Warmup caches	30s
Conformance Build AVX3	1m 4s
Conformance Build AVX2	43s
Conformance Build SSE4	1m 12s
Conformance Build SSSE3	53s
Conformance Build EMU128	49s
Conformance Build SCALAR	55s
Conformance Build SCALAR_ASAN	58s
Conformance Test main_level5 on AVX3	59s
Conformance Test main_level5 on AVX2	1m 3s
Conformance Test main_level5 on SSE4	54s
Conformance Test main_level5 on SSSE3	44s
Conformance Test main_level5 on EMU128	50s
Conformance Test main_level5 on SCALAR	51s
Conformance Test main_level5 on SCALAR_ASAN	1m 19s
Conformance Test main_level10 on AVX3	1m 9s
Conformance Test main_level10 on AVX2	52s
Conformance Test main_level10 on SSE4	51s
Conformance Test main_level10 on SSSE3	50s
Conformance Test main_level10 on EMU128	1m 1s
Conformance Test main_level10 on SCALAR	1m 6s
Conformance Test main_level10 on SCALAR_ASAN	1m 30s
	21m 3s

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