Improvements to RUF015 (#7848)

## Summary

Resolves https://github.com/astral-sh/ruff/issues/7618. 

The list of builtin iterator is not exhaustive.

## Test Plan

`cargo test`

``` python
a = [1, 2]

examples = [
    enumerate(a),
    filter(lambda x: x, a),
    map(int, a),
    reversed(a),
    zip(a),
    iter(a),
]

for example in examples:
    print(next(example))
```

crates/ruff_python_stdlib/src/builtins.rs

@@ -337,3 +337,11 @@ pub fn is_builtin(name: &str) -> bool {
             | "zip"
     )
 }
+
+/// Returns `true` if the given name is that of a Python builtin iterator.
+pub fn is_iterator(name: &str) -> bool {
+    matches!(
+        name,
+        "enumerate" | "filter" | "map" | "reversed" | "zip" | "iter"
+    )
+}