Import gp_url_tools extention from Greenplum#40

Vlasdislav wants to merge 2 commits into

open-gpdb:REL_2_STABLEopen-gpdb/cloudberry:REL_2_STABLEfrom

Vlasdislav:gp_url_toolsVlasdislav/cloudberry:gp_url_toolsCopy head branch name to clipboard