Recursively enable mutable, abstract types for: fbcode//multifeed/ran…

…king/ranking_config:if

Summary:
While the mutable and abstract type generation for thrift-python types is currently marked as "experimental", we are very close (i.e., few weeks away) to making them generally available and retiring these flags. The ones added here are merely needed to complete the couple of pilot migrations (of multifeed py-deprecated libraries), as final validation prior to launch. They will be removed soon thereafter (cleanup is tracked automatically by DO_BEFORE tasks).
Generated by:

```
buck_transform_recursive.par --update-string-list-attribute=thrift_python_options:+experimental_generate_mutable_types --update-string-list-attribute=thrift_python_options:+experimental_generate_abstract_types fbcode//multifeed/ranking/ranking_config:if
```

Reviewed By: yoney

Differential Revision: D66771843

fbshipit-source-id: 4d55635a9947a7510407f005a5a2056f04289759

fb303/thrift/BUCK

@@ -46,7 +46,11 @@ thrift_library(
     thrift_cpp2_options = "frozen2,reflection",
     thrift_java_swift_options = ["deprecated_allow_leagcy_reflection_client"],
     thrift_js_options = ["node"],
-    thrift_python_options = ["experimental_generate_mutable_types"],
+    # DO_BEFORE(aristidis, 20250130): Remove experimental flags after launch.
+    thrift_python_options = [
+        "experimental_generate_mutable_types",
+        "experimental_generate_abstract_types",
+    ],
     thrift_rust_options = [
         "deprecated_default_enum_min_i32",
         "serde",