Merge bitcoin/bitcoin#30438: guix: (explicitly) build Linux GCC with … #102

Job	Run time
test each commit	0s
ASan + LSan + UBSan + integer, no depends, USDT	1h 13m 41s
macOS 13 native, x86_64, no depends, sqlite only, gui	54m 18s
Win64 native, VS 2022	2h 21m 55s
	4h 29m 54s

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