Explicitly pass observability_options into BatchCreateSessions for pools

Author: odeke-em

google/cloud/spanner_v1/pool.py

@@ -206,7 +206,11 @@ def bind(self, database):
             session_template=Session(creator_role=self.database_role),
         )
 
-        while trace_call("Cloudspanner.FixedPool.BatchCreateSessions", self):
+        observability_options = getattr(database, "observability_options")
+        while trace_call(
+            "Cloudspanner.FixedPool.BatchCreateSessions",
+            observability_options=observability_options,
+        ):
             while not self._sessions.full():
                 resp = api.batch_create_sessions(
                     request=request,
@@ -424,7 +428,11 @@ def bind(self, database):
             session_template=Session(creator_role=self.database_role),
         )
 
-        while trace_call("Cloudspanner.PingingPool.BatchCreateSessions", self):
+        observability_options = getattr(database, "observability_options")
+        while trace_call(
+            "Cloudspanner.PingingPool.BatchCreateSessions",
+            observability_options=observability_options,
+        ):
             while created_session_count < self.size:
                 resp = api.batch_create_sessions(
                     request=request,