Add tests for the bootctl passphrase entry UI and TKey-based LUKS
unlock flow:
- check_passphrase(): Tests the passphrase textline widget, verifying
character input, backspace handling, and passphrase retrieval
- prepare_tkey_test(): Sets up the TKey emulator with a test pubkey
and configures app mode to test replugging scenarios
- try_tkey_unlock(): Tests the complete TKey unlock flow including
passphrase entry and LUKS partition decryption
- bootctl_logic_tkey: Full integration test for TKey-based encrypted
boot with mouse click interactions
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
4d30a452bc