404 Not Found for EmptyOperator docs for version 2.7+ #52643 (#53965)

* added empty and datetime operator redirects airflow-core

* added _api to paths of redirects

* fixed destination paths for redirects

Author: suman-himanshu

airflow-core/docs/redirects.txt

@@ -183,3 +183,6 @@ howto/operator/file.rst ../../apache-airflow-providers-standard/stable/sensors/f
 howto/operator/python.rst ../../apache-airflow-providers-standard/stable/operators/python.rst
 howto/operator/time.rst ../../apache-airflow-providers-standard/stable/sensors/datetime.rst
 howto/operator/weekday.rst ../../apache-airflow-providers-standard/stable/operators/datetime.rst#branchdayofweekoperator
+
+_api/airflow/operators/datetime/index.html ../apache-airflow-providers-standard/stable/_api/airflow/providers/standard/operators/datetime/index.html
+_api/airflow/operators/empty/index.html ../apache-airflow-providers-standard/stable/_api/airflow/providers/standard/operators/empty/index.html