common : update download code (#19573) #104

Job	Run time
server-windows	13m 42s
server (ADDRESS, RelWithDebInfo)	19m 35s
server (Release)	11m 5s
server (UNDEFINED, RelWithDebInfo)	16m 3s
server (Release, LLAMA_ARG_BACKEND_SAMPLING=1)	11m 15s
	1h 11m 40s

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