Accept non-aliased (but correct) import in unconventional-import-alias (#10729)
## Summary
Given:
```toml
[tool.ruff.lint.flake8-import-conventions.aliases]
"django.conf.settings" = "settings"
```
We should accept `from django.conf import settings`.
Closes https://github.com/astral-sh/ruff/issues/10599.