fix: gate EVM clear-signing tests on EthereumTxMetadata

Tests gate on EthereumSignTx which exists in all firmware versions.
Should gate on EthereumTxMetadata (the new message) so tests skip
when firmware lacks clear-signing support instead of running and
failing.

Author: BitHighlander

tests/test_msg_ethereum_clear_signing.py

@@ -412,7 +412,7 @@ class TestEthereumClearSigning(common.KeepKeyTest):
     def setUp(self):
         super().setUp()
         self.requires_firmware("7.14.0")
-        self.requires_message("EthereumSignTx")
+        self.requires_message("EthereumTxMetadata")
         self.setup_mnemonic_nopin_nopassphrase()
 
     def test_valid_metadata_returns_verified(self):