PYTHON-4704 Migrate test_bulk.py to async

test/__init__.py

@@ -569,7 +569,10 @@ def require_secondaries_count(self, count):
         def sec_count():
             return 0 if not self.client else len(self.client.secondaries)
 
-        return self._require(lambda: sec_count() >= count, "Not enough secondaries available")
+        def check():
+            return sec_count() >= count
+
+        return self._require(check, "Not enough secondaries available")
 
     @property
     def supports_secondary_read_pref(self):

test/asynchronous/__init__.py

@@ -571,7 +571,10 @@ def require_secondaries_count(self, count):
         async def sec_count():
             return 0 if not self.client else len(await self.client.secondaries)
 
-        return self._require(lambda: sec_count() >= count, "Not enough secondaries available")
+        async def check():
+            return await sec_count() >= count
+
+        return self._require(check, "Not enough secondaries available")
 
     @property
     async def supports_secondary_read_pref(self):