Tests

[frost] EncodedFrostKey BorrowDecode and correct markers #735

Job	Run time
build	1m 45s
Rustfmt	14s
clippy_check	29s
doc-build	34s
test (x86_64-unknown-linux-gnu)	1m 41s
test-alloc (secp256kfun)	1m 12s
test (armv7-unknown-linux-gnueabihf)	5m 52s
test-minimal (secp256kfun)	1m 10s
test-nightly	38s
test-alloc (sigma_fun)	32s
test-minimal (sigma_fun)	35s
test-alloc (ecdsa_fun)	53s
test-minimal (ecdsa_fun)	55s
test-alloc (schnorr_fun)	1m 5s
test-minimal (schnorr_fun)	58s
	18m 33s

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