fix: raise precise exception in rest_catalog list_namespaces (apache#1977)

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# Rationale for this change

`list_namespaces` should raise a `NoSuchNamespaceException` instead of a
generic `RestException` in case of a 404 response.


https://github.com/apache/iceberg/blob/main/open-api/rest-catalog-open-api.yaml#L279-L287

Also this is in line with the Java implementation of
[NamespaceErrorHandler](https://github.com/apache/iceberg/blob/9fb80b7167e58a2daef80f4a1a09f223b870c030/core/src/main/java/org/apache/iceberg/rest/ErrorHandlers.java#L182)
used by
`[listNamespaces()](https://github.com/apache/iceberg/blob/9fb80b7167e58a2daef80f4a1a09f223b870c030/core/src/main/java/org/apache/iceberg/rest/RESTSessionCatalog.java#L584)`

# Are these changes tested?

I added a unit test for it

# Are there any user-facing changes?

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Author: alessandro-nori

pyiceberg/catalog/rest/__init__.py

@@ -816,7 +816,7 @@ def list_namespaces(self, namespace: Union[str, Identifier] = ()) -> List[Identi
         try:
             response.raise_for_status()
         except HTTPError as exc:
-            self._handle_non_200_response(exc, {})
+            self._handle_non_200_response(exc, {404: NoSuchNamespaceError})
 
         return ListNamespaceResponse.model_validate_json(response.text).namespaces
 

tests/catalog/test_rest.py

@@ -555,6 +555,24 @@ def test_list_namespace_with_parent_200(rest_mock: Mocker) -> None:
     ]
 
 
+def test_list_namespace_with_parent_404(rest_mock: Mocker) -> None:
+    rest_mock.get(
+        f"{TEST_URI}v1/namespaces?parent=some_namespace",
+        json={
+            "error": {
+                "message": "Namespace provided in the `parent` query parameter is not found",
+                "type": "NoSuchNamespaceException",
+                "code": 404,
+            }
+        },
+        status_code=404,
+        request_headers=TEST_HEADERS,
+    )
+
+    with pytest.raises(NoSuchNamespaceError):
+        RestCatalog("rest", uri=TEST_URI, token=TEST_TOKEN).list_namespaces(("some_namespace",))
+
+
 @pytest.mark.filterwarnings(
     "ignore:Deprecated in 0.8.0, will be removed in 1.0.0. Iceberg REST client is missing the OAuth2 server URI:DeprecationWarning"
 )