Check dataflow dependency between plan nodes in optimizer (#679)

* Check the dataflow dependency in optimizer

* Fix end condition

* Cleanup

* Fix failed test cases

* Refactor input variables setter of plan node

* Check whether the data flow is same as the control flow

* Add symbol printer

* Add utils

* Add OptContext

Co-authored-by: jie.wang <38901892+jievince@users.noreply.github.com>