MuSig2 support #1438

Job	Run time
Compilation for X, S+, Stax and Flex (nanox, $NANOX_SDK)	1m 49s
Compilation for X, S+, Stax and Flex (nanosp, $NANOSP_SDK)	1m 54s
Compile the UX-less version of the app on Nano S+ for performance tests	1m 33s
Compilation for X, S+, Stax and Flex (stax, $STAX_SDK)	2m 1s
Compilation for X, S+, Stax and Flex (flex, $FLEX_SDK)	2m 4s
Performance report	3m 32s
Unit test	1m 59s
Tests with the JS library	1m 19s
Tests on mainnet (nanox)	26s
Tests on mainnet (nanosp)	28s
Tests with the Python library and legacy Bitcoin app	38s
Tests on mainnet (stax)	28s
Tests on mainnet (flex)	28s
Tests for rust client library	1m 42s
	20m 21s

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