Mark unspendable pubkeys as 'dummy' during wallet registration #1194

Job	Run time
Compilation for NanoS, X, S+, and Stax (nanos, $NANOS_SDK)	1m 48s
Compilation for NanoS, X, S+, and Stax (nanox, $NANOX_SDK)	1m 57s
Compilation for NanoS, X, S+, and Stax (nanosp, $NANOSP_SDK)	1m 49s
Compilation for NanoS, X, S+, and Stax (stax, $STAX_SDK)	1m 56s
Tests with the Python library and legacy Bitcoin app	50s
Tests on mainnet (nanos)	32s
Unit test	1m 54s
Tests on mainnet (nanox)	32s
Tests (nanos)	13m 30s
Tests on mainnet (nanosp)	32s
Tests (nanox)	13m 33s
Tests on mainnet (stax)	32s
Tests (nanosp)	13m 35s
Tests with the JS library	1m 22s
Tests for rust client library	1m 37s
Tests (stax)	13m 36s
	1h 9m 35s

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