Fixed to check number key from jenkins response (#16963)

Co-authored-by: 남상준/데이터솔루션팀 <sangjun.nam@musinsa.com>

airflow/providers/jenkins/operators/jenkins_job_trigger.py

@@ -168,7 +168,7 @@ def poll_job_in_queue(self, location: str, jenkins_server: Jenkins) -> int:
             )
             if location_answer is not None:
                 json_response = json.loads(location_answer['body'])
-                if 'executable' in json_response:
+                if 'executable' in json_response and 'number' in json_response['executable']:
                     build_number = json_response['executable']['number']
                     self.log.info('Job executed on Jenkins side with the build number %s', build_number)
                     return build_number