MuSig2 support #1444

Job	Run time
Compile the UX-less version of the app on Nano S+ for performance tests	1m 35s
Compilation for X, S+, Stax and Flex (nanox, $NANOX_SDK)	1m 46s
Compilation for X, S+, Stax and Flex (nanosp, $NANOSP_SDK)	1m 46s
Compilation for X, S+, Stax and Flex (stax, $STAX_SDK)	1m 57s
Compilation for X, S+, Stax and Flex (flex, $FLEX_SDK)	1m 58s
Performance report	3m 35s
Unit test	1m 21s
Tests with the Python library and legacy Bitcoin app	37s
Tests with the JS library	1m 21s
Tests on mainnet (nanox)	25s
Tests on mainnet (nanosp)	29s
Tests for rust client library	1m 35s
Tests on mainnet (stax)	30s
Tests on mainnet (flex)	23s
	19m 18s

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