[#21164] YSQL, ASH: Set session_id in incoming tserver RPCs

Summary:
This diff sets the `session_id` in ASH metadata to incoming RPCs in tserver.
Jira: DB-10099

Test Plan: Jenkins

Reviewers: amitanand, hbhanawat

Reviewed By: amitanand

Subscribers: yql, ybase, bogdan

Differential Revision: https://phorge.dev.yugabyte.com/D33752

Author: abhinab-yb

src/yb/tserver/pg_client_session.cc

@@ -1058,6 +1058,7 @@ Status PgClientSession::DoPerform(const DataPtr& data, CoarseTimePoint deadline,
   if (const auto& wait_state = ash::WaitStateInfo::CurrentWaitState()) {
     if (options.has_ash_metadata()) {
       wait_state->UpdateMetadataFromPB(options.ash_metadata(), /* use_hex */ false);
+      wait_state->set_session_id(id_);
     }
   }
   auto ddl_mode = options.ddl_mode() || options.yb_non_ddl_txn_for_sys_tables_allowed();