Include alias when formatting import-from structs (#5786)

## Summary

When required-imports is set with the syntax from ... import ... as ...,
autofix I002 is failing

## Test Plan

Reuse the same python files as
`crates/ruff/src/rules/isort/mod.rs:required_import` test.

crates/ruff_python_ast/src/imports.rs

@@ -85,6 +85,9 @@ impl std::fmt::Display for ImportFrom<'_> {
             write!(f, "{module}")?;
         }
         write!(f, " import {}", self.name.name)?;
+        if let Some(as_name) = self.name.as_name {
+            write!(f, " as {as_name}")?;
+        }
         Ok(())
     }
 }