Improve debuggability of place_comment (#5209)

## Summary

I found it hard to figure out which function decides placement for a
specific comment. An explicit loop makes this easier to debug

## Test Plan

There should be no functional changes, no changes to the formatting of
the fixtures.

crates/ruff_python_formatter/src/comments/visitor.rs

@@ -615,18 +615,6 @@ impl<'a> CommentPlacement<'a> {
             comment: comment.into(),
         }
     }
-
-    /// Returns the placement if it isn't [`CommentPlacement::Default`], otherwise calls `f` and returns the result.
-    #[inline]
-    pub(super) fn or_else<F>(self, f: F) -> Self
-    where
-        F: FnOnce(DecoratedComment<'a>) -> CommentPlacement<'a>,
-    {
-        match self {
-            CommentPlacement::Default(comment) => f(comment),
-            placement => placement,
-        }
-    }
 }
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]