[numpy] Update NPY201: add np.NAN to exception (#12292)

Co-authored-by: Micha Reiser <micha@reiser.io>

crates/ruff_linter/resources/test/fixtures/numpy/NPY201.py

@@ -68,3 +68,5 @@ def func():
     np.longfloat(12+34j)
 
     np.lookfor
+
+    np.NAN

crates/ruff_linter/src/rules/numpy/rules/numpy_2_0_deprecation.rs

@@ -380,8 +380,8 @@ pub(crate) fn numpy_2_0_deprecation(checker: &mut Checker, expr: &Expr) {
                     guideline: None,
                 },
             }),
-            ["numpy", "NaN"] => Some(Replacement {
+            ["numpy", existing @ ("NaN" | "NAN")] => Some(Replacement {
-                existing: "NaN",
+                existing,
                 details: Details::AutoImport {
                     path: "numpy",
                     name: "nan",

crates/ruff_linter/src/rules/numpy/snapshots/ruff_linter__rules__numpy__tests__numpy2-deprecation_NPY201.py.snap

@@ -552,6 +552,7 @@ NPY201.py:68:5: NPY201 [*] `np.longfloat` will be removed in NumPy 2.0. Use `num
    68 |+    np.longdouble(12+34j)
 69 69 | 
 70 70 |     np.lookfor
+71 71 | 
 
 NPY201.py:70:5: NPY201 `np.lookfor` will be removed in NumPy 2.0. Search NumPy’s documentation directly.
    |
@@ -559,4 +560,22 @@ NPY201.py:70:5: NPY201 `np.lookfor` will be removed in NumPy 2.0. Search NumPy
 69 | 
 70 |     np.lookfor
    |     ^^^^^^^^^^ NPY201
+71 | 
+72 |     np.NAN
    |
+
+NPY201.py:72:5: NPY201 [*] `np.NAN` will be removed in NumPy 2.0. Use `numpy.nan` instead.
+   |
+70 |     np.lookfor
+71 | 
+72 |     np.NAN
+   |     ^^^^^^ NPY201
+   |
+   = help: Replace with `numpy.nan`
+
+ℹ Safe fix
+69 69 | 
+70 70 |     np.lookfor
+71 71 | 
+72    |-    np.NAN
+   72 |+    np.nan