Fix syntax in BK CI script (#17462)

(cherry picked from commit 422cd4e)

Author: andsel

.buildkite/scripts/jdk-matrix-tests/generate-steps.py

@@ -258,7 +258,7 @@ def ruby_unit_test(self) -> JobRetValues:
         )
 
     def integration_test_parts(self, parts) -> list[JobRetValues]:
-        return list(map(lambda idx: integration_tests(self, idx+1, parts), range(parts))
+        return list(map(lambda idx: integration_tests(self, idx+1, parts), range(parts)))
 
     def integration_tests(self, part: int, parts: int) -> JobRetValues:
         step_name_human = f"Integration Tests - {part}/{parts}"
@@ -277,7 +277,7 @@ def integration_tests(self, part: int, parts: int) -> JobRetValues:
         )
 
     def pq_integration_test_parts(self, parts) -> list[JobRetValues]:
-        return list(map(lambda idx: pq_integration_tests(self, idx+1, parts), range(parts))
+        return list(map(lambda idx: pq_integration_tests(self, idx+1, parts), range(parts)))
 
     def pq_integration_tests(self, part: int, parts: int) -> JobRetValues:
         step_name_human = f"IT Persistent Queues - {part}/{parts}"