[ty] highlight the argument in `static_assert` error messages (#19426)
Closes https://github.com/astral-sh/ty/issues/209.
Before:
```
error[static-assert-error]: Static assertion error: custom message
--> test.py:2:1
|
1 | from ty_extensions import static_assert
2 | static_assert(3 > 4, "custom message")
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
```
After:
```
error[static-assert-error]: Static assertion error: custom message
--> test.py:2:1
|
1 | from ty_extensions import static_assert
2 | static_assert(3 > 4, "custom message")
| ^^^^^^^^^^^^^^-----^^^^^^^^^^^^^^^^^^^
| |
| Inferred type of argument is `Literal[False]`
|
```