Use Flags::intersects rather than Flags::contains (#6007)

## Summary

This is equivalent for a single flag, but I think it's more likely to be
correct when the bitflags are modified -- the primary reason being that
we sometimes define flags as the union of other flags, e.g.:

```rust
const ANNOTATION = Self::TYPING_ONLY_ANNOTATION.bits() | Self::RUNTIME_ANNOTATION.bits();
```

In this case, `flags.contains(Flag::ANNOTATION)` requires that _both_
flags in the union are set, whereas `flags.intersects(Flag::ANNOTATION)`
requires that _at least one_ flag is set.

crates/ruff_python_semantic/src/scope.rs

@@ -163,7 +163,7 @@ impl<'a> Scope<'a> {
 
     /// Returns `true` if this scope uses locals (e.g., `locals()`).
     pub const fn uses_locals(&self) -> bool {
-        self.flags.contains(ScopeFlags::USES_LOCALS)
+        self.flags.intersects(ScopeFlags::USES_LOCALS)
     }
 }