Merge bitcoin-core/HWI#733: build: Use debian buster for releases #70

Job	Run time
Ledger App builder	1m 21s
lint	30s
bitcoind builder	18m 28s
Dist builder	4m 9s
Non-device tests	25s
Sim builder (trezor-1, trezor-firmware, test/work/trezor-firmware)	1m 30s
Type check	30s
Sim builder (trezor-t, trezor-firmware, test/work/trezor-firmware)	1m 49s
Wine builder	5m 55s
Sim builder (coldcard, coldcard-mpy, test/work/firmware/external/micropython/ports/unix/coldcard-...	8m 47s
Sim builder (bitbox01, mcu, test/work/mcu)	1m 33s
Sim builder (jade, jade, test/work/jade/simulator)	8m 51s
Sim builder (ledger, speculos, test/work/speculos)	1m 42s
Sim builder (keepkey, keepkey-firmware, test/work/keepkey-firmware/bin)	3m 25s
Python ${{ matrix.python-version }} ${{ matrix.device }} ${{ matrix.interface }}	0s
Python ${{ matrix.python-version }} ${{ matrix.device }} ${{ matrix.script.name }}	0s
	58m 55s

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