Update in-code default for enable_resource_pools_for_interaction_gene…

…rated_processor_only

Summary: `enable_resource_pools_for_interaction_generated_processor_only` Thrift flag has been enabled for serveral weeks globally. Let's update the in-code default so we can eventually remove the Thrift flag.

Reviewed By: avalonalex

Differential Revision: D63613348

fbshipit-source-id: 7c49414f5f76e7596e1ba0b29b810193785be816

thrift/lib/cpp2/server/ServerFlags.cpp

@@ -35,7 +35,7 @@ FOLLY_GFLAGS_DEFINE_bool(
 THRIFT_FLAG_DEFINE_bool(allow_set_thread_manager_resource_pools, false);
 THRIFT_FLAG_DEFINE_bool(enable_resource_pools_for_interaction, false);
 THRIFT_FLAG_DEFINE_bool(
-    enable_resource_pools_for_interaction_generated_processor_only, false);
+    enable_resource_pools_for_interaction_generated_processor_only, true);
 
 THRIFT_FLAG_DEFINE_bool(
     allow_resource_pools_set_thread_manager_from_executor, true);