Add checks for array functions to recognize and decode VPC (#1064)

* Add checks for array functions to recognize and decode VPC

- Added for array functions size, head, last, isEmpty, reverse,
  agtype_in_operator and agtype_access_slice.

- Fixed a bug where object input to reverse would terminate the server
  instead of erroring out.

- Added regression tests.

* Fix issue with in operator tranformation

- We need to build a function call here if the rexpr is already
  tranformed. It can be already tranformed cypher_list as columnref.

Author: MuhammadTahaNaveed