chore(deps): migrate from gym to gymnasium

[SunsetWolf]

Description

Motivation and Context

How Has This Been Tested?

• Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• If you are adding a new feature, test on your own test scripts.

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• Fix bugs
• Add new feature
• Update documentation

[Abhijais4896]

from contextlib import contextmanager
from typing import Any, Callable, Dict, Generator, List, Optional, Set, Tuple, Type, Union, cast

import gym
import gymnasium as gym
import numpy as np
from tianshou.env import BaseVectorEnv, DummyVectorEnv, ShmemVectorEnv, SubprocVectorEnv