chore(python): allow ignoring xpub magic in trezorctl #18787

Job	Run time
Style check	3m 53s
Gen check	3m 8s
Changelog check	35s
Defs check	2m 48s
Cargo.lock check	28s
Block fixup	10s
uv.lock check	2m 21s
Release commit message check	-1s
	13m 22s

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