Fix placement for comments within f-strings concatenations (#7047)

## Summary

Restores the dangling comment handling for f-strings, which broke with
the parenthesized expression code.

Closes https://github.com/astral-sh/ruff/issues/6898.

## Test Plan

`cargo test`

No change in any of the similarity indexes or changed file counts:

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

|--------------|------------------:|------------------:|------------------:|
| cpython | 0.76083 | 1789 | 1632 |
| django | 0.99957 | 2760 | 67 |
| transformers | 0.99927 | 2587 | 468 |
| twine | 0.99982 | 33 | 1 |
| typeshed | 0.99978 | 3496 | 2173 |
| warehouse | 0.99818 | 648 | 24 |
| zulip | 0.99942 | 1437 | 32 |

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

@@ -33,3 +33,27 @@ result_f = (
     # comment
     ''
 )
+
+(
+    f'{1}'  # comment
+    f'{2}'
+)
+
+(
+    f'{1}'
+    f'{2}'  # comment
+)
+
+(
+    1, (  # comment
+        f'{2}'
+    )
+)
+
+(
+    (
+        f'{1}'
+        # comment
+    ),
+    2
+)