Avoid extra parentheses in unary expressions (#7428)

## Summary

This PR applies a similar fix to unary expressions as in
https://github.com/astral-sh/ruff/pull/7424. Specifically, we only need
to parenthesize the entire operator if the operand itself doesn't have
parentheses, and requires parentheses.

Closes https://github.com/astral-sh/ruff/issues/7423.

## Test Plan

`cargo test`

No change in similarity.

Before:

| project | similarity index | total files | changed files |

|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99982 | 2760 | 37 |
| transformers | 0.99957 | 2587 | 399 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99923 | 648 | 18 |
| zulip | 0.99962 | 1437 | 22 |

After:

| project | similarity index | total files | changed files |

|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99982 | 2760 | 37 |
| transformers | 0.99957 | 2587 | 399 |
| twine | 1.00000 | 33 | 0 |
| typeshed | 0.99983 | 3496 | 18 |
| warehouse | 0.99923 | 648 | 18 |
| zulip | 0.99962 | 1437 | 22 |

crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/unary.py

@@ -151,3 +151,13 @@ if (
   not  # comment
   a):
     ...
+
+# Regression test for: https://github.com/astral-sh/ruff/issues/7423
+if True:
+    if True:
+        if True:
+            if not yn_question(
+                Fore.RED
+                + "WARNING: Removing listed files. Do you really want to continue. yes/n)? "
+            ):
+                pass