fix(tests): python >=3.11 compatibility for identifiers

Python 3.11 changed IntEnum.__str__ to return the number instead of the
enum value name. This breaks fixtures.json because pytest uses
str(value) to generate the test identifier names, and in a lot of places
our identifiers use the enum values.

This override of `_idval_from_value` explicitly generates a name from
the IntEnum instead of using the __str__ implementation.

tests/conftest.py

@@ -17,11 +17,13 @@
 from __future__ import annotations
 
 import os
-import typing as t
+from enum import IntEnum
 from pathlib import Path
+import typing as t
 
 import pytest
 import xdist
+from _pytest.python import IdMaker
 from _pytest.reports import TestReport
 
 from trezorlib import debuglink, log, models
@@ -464,6 +466,16 @@ def pytest_configure(config: "Config") -> None:
     if config.getoption("verbose"):
         log.enable_debug_output()
 
+    idval_orig = IdMaker._idval_from_value
+
+    def idval_from_value(self: IdMaker, val: object) -> str | None:
+        if isinstance(val, IntEnum):
+            return f"{type(val).__name__}.{val.name}"
+        return idval_orig(self, val)
+
+    IdMaker._idval_from_value = idval_from_value
+
+
 
 def pytest_runtest_setup(item: pytest.Item) -> None:
     """Called for each test item (class, individual tests).