Format raise statement (#5595)

## Summary

This PR implements the formatting of `raise` statements. I haven't
looked at the black implementation, this is inspired from from the
`return` statements formatting.

## Test Plan

The black differences with insta.

I also compared manually some edge cases with very long string and call
chaining and it seems to do the same formatting as black.

There is one issue:
```python
# input

raise OsError(
    "aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa).a(aaaa)


# black

raise OsError(
    "aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(
    aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa
).a(
    aaaa
)


# ruff

raise OsError(
    "aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa"
) from a.aaaaa(
    aksjdhflsakhdflkjsadlfajkslhfdkjsaldajlahflashdfljahlfksajlhfajfjfsaahflakjslhdfkjalhdskjfa
).a(aaaa)
```

But I'm not sure this diff is the raise formatting implementation.

---------

Co-authored-by: Louis Dispa <ldispa@deezer.com>

crates/ruff_python_formatter/src/statement/stmt_raise.rs

@@ -1,5 +1,8 @@
-use crate::{not_yet_implemented, FormatNodeRule, PyFormatter};
-use ruff_formatter::{write, Buffer, FormatResult};
+use crate::expression::parentheses::Parenthesize;
+use crate::{AsFormat, FormatNodeRule, PyFormatter};
+use ruff_formatter::prelude::{space, text};
+use ruff_formatter::{write, Buffer, Format, FormatResult};
+
 use rustpython_parser::ast::StmtRaise;
 
 #[derive(Default)]
@@ -7,6 +10,32 @@ pub struct FormatStmtRaise;
 
 impl FormatNodeRule<StmtRaise> for FormatStmtRaise {
     fn fmt_fields(&self, item: &StmtRaise, f: &mut PyFormatter) -> FormatResult<()> {
-        write!(f, [not_yet_implemented(item)])
+        let StmtRaise {
+            range: _,
+            exc,
+            cause,
+        } = item;
+
+        text("raise").fmt(f)?;
+
+        if let Some(value) = exc {
+            write!(
+                f,
+                [space(), value.format().with_options(Parenthesize::Optional)]
+            )?;
+        }
+
+        if let Some(value) = cause {
+            write!(
+                f,
+                [
+                    space(),
+                    text("from"),
+                    space(),
+                    value.format().with_options(Parenthesize::Optional)
+                ]
+            )?;
+        }
+        Ok(())
     }
 }