Retain `lazy` keyword when sorting imports (#23762)
## Summary
For now, we keep our sections as-is, but within each section, we show
all the eager imports followed by all the lazy imports, e.g.:
```python
import json
import os
import subprocess
from collections import defaultdict
from pathlib import Path
from typing import Final
lazy import ast
lazy import shutil
lazy from dataclasses import dataclass
```
We may change this behavior later; it shouldn't be considered stable.
See: https://github.com/astral-sh/ruff/issues/21305.
