[test] Move test framework crypto functions to crypto/

test/functional/feature_utxo_set_hash.py

@@ -11,7 +11,7 @@ from test_framework.messages import (
     COutPoint,
     from_hex,
 )
-from test_framework.muhash import MuHash3072
+from test_framework.crypto.muhash import MuHash3072
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import assert_equal
 from test_framework.wallet import MiniWallet