Add enumerate --no-emulators option to skip enumerating emulators #12

Job	Run time
Ledger App builder	1m 31s
lint	34s
Dist builder	5m 0s
bitcoind builder	19m 9s
Non-device tests	40s
Sim builder (trezor-1, trezor-firmware, test/work/trezor-firmware)	6m 8s
Type check	38s
Wine builder	5m 10s
Sim builder (trezor-t, trezor-firmware, test/work/trezor-firmware)	2m 10s
Sim builder (coldcard, coldcard-mpy, test/work/firmware/external/micropython/ports/unix/coldcard-...	10m 8s
Sim builder (bitbox01, mcu, test/work/mcu)	1m 29s
Sim builder (jade, jade, test/work/jade/simulator)	8m 21s
Sim builder (ledger, speculos, test/work/speculos)	1m 52s
Sim builder (keepkey, keepkey-firmware, test/work/keepkey-firmware/bin)	2m 35s
Python ${{ matrix.python-version }} ${{ matrix.device }} ${{ matrix.script.name }}	0s
Python ${{ matrix.python-version }} ${{ matrix.device }} ${{ matrix.interface }}	0s
	1h 5m 25s

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