Application Gateway WAF policy workbook (#3047)

* work book + gallary

* Naming

* Rename - case change

* Rename - remove workbooks from folder name

* fix path

* try to extract sub

* try

* try

* test WB

* test WB

* test WB

* 2 params

* appGW param

* Workbook

* associations fix

* by URL

* remove text

* column_ifexists

* text fix

* CR fixes

* remove prohibited field fromTemplateId

* remove previw

Author: NiviShenker