ansible-test yamllint: fix UnicodeDecodeError (#55364)

* ansible-test yamllint: fix UnicodeDecodeError

* Conditional fix

(cherry picked from commit f8bebc61c8)

test/runner/lib/util.py

@@ -385,7 +385,10 @@ def raw_command(cmd, capture=False, env=None, data=None, cwd=None, explain=False
 
     if communicate:
         encoding = 'utf-8'
-        data_bytes = data.encode(encoding, 'surrogateescape') if data else None
+        if data is None or isinstance(data, bytes):
+            data_bytes = data
+        else:
+            data_bytes = data.encode(encoding, 'surrogateescape')
         stdout_bytes, stderr_bytes = process.communicate(data_bytes)
         stdout_text = stdout_bytes.decode(encoding, str_errors) if stdout_bytes else u''
         stderr_text = stderr_bytes.decode(encoding, str_errors) if stderr_bytes else u''