Fix panic when formatting comments in unary expressions
Summary
--
This is a second attempt at fixing #19226 based on the feedback in https://github.com/astral-sh/ruff/pull/20494#issuecomment-3467920065.
We currently mark the comment in an expression like this:
```py
if '' and (not #
0):
pass
```
as a leading comment on `not`, eventually causing a panic in
`Operand::has_unparenthesized_leading_comments` because the end of the comment
is greater than the start of the expression.
https://github.com/astral-sh/ruff/blob/a1d9cb5830eca9b63e7fb529504fc536e99bca23/crates/ruff_python_formatter/src/expression/binary_like.rs#L843
This PR fixes the issue by instead making such a comment a dangling comment on
the unary expression.
In the third commit, I instead tried making the comment a leading comment on the
operand, which also looks pretty reasonable to me. Making it a dangling comment
seems more in line with the docs on `handle_unary_op_comments`, though.
I also tried deleting the leading comment logic in favor of the new dangling
logic in the fifth commit before reverting in the sixth. This looks okay to me
too, but the current state of the PR seems like the least invasive fix.
Test Plan
--
A new, minimized test case based on the issue. I also checked that the original
snippet from the report works now.
Co-authored-by: Takayuki Maeda <takoyaki0316@gmail.com>
