Raise UnicodeEncodeError for surrogates in sqlite.executescript (RustPython#6024)

Author: ever0de

Lib/test/test_sqlite3/test_dbapi.py

@@ -1655,8 +1655,6 @@ def test_cursor_executescript_with_null_characters(self):
                 insert into a(i) values (5);
                 """)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_cursor_executescript_with_surrogates(self):
         con = sqlite.connect(":memory:")
         cur = con.cursor()

stdlib/src/sqlite.rs

@@ -1640,6 +1640,8 @@ mod _sqlite {
             script: PyStrRef,
             vm: &VirtualMachine,
         ) -> PyResult<PyRef<Self>> {
+            script.ensure_valid_utf8(vm)?;
+
             let db = zelf.connection.db_lock(vm)?;
 
             db.sql_limit(script.byte_len(), vm)?;