fix: USV3 encoding/decoding after rebase

- Also do some renamings and comment improvements:
transfer method -> type
- Remove integration tests since we no longer support direct calls to USV3 executor, even for testing.

src/encoding/evm/tycho_encoders.rs

@@ -916,7 +916,7 @@ mod tests {
                     "1d96f2f6bef1202e4ce1ff6dad0c2cb002861d3e",
                     // zero for one
                     "00",
-                    // transfer method
+                    // transfer type
                     "00",
                 ))
             );