fix!: UX of supplier linking with supplier users on portal pages (#35836)

* fix: create and add Portal Users child table in Supplier/Customer

Issue #35772

* fix: modify the original permission check hook

* fix: auto-add role for portal users

* fix: added patch for auto-populating portal users

* fix: modify patch to fetch users correctly

* fix: remove unnecessary code for updating naming_series

* fix(UX): show portal user in list view

Also split columns to reduce whitespace.

* refactor: simpler role checking

* fix: consider parenttype while fetching portal user

* refactor: simpler code, rename variable

* test: supplier portal user can access their docs

* refactor: only add role if not added

* refactor: rename and move patch to supplier

* refactor: dont add role if no perm or existing doc

* fix: add role before save

* refactor: run query directly

* refactor: split patch and apply roles

- if role isn't present dont add portal user
- ignore failure as it's not critical

* test: fix permission creation for webform test

---------

Co-authored-by: Ankush Menat <ankush@frappe.io>

erpnext/utilities/doctype/portal_user/portal_user.json

@@ -0,0 +1,34 @@
+{
+ "actions": [],
+ "allow_rename": 1,
+ "creation": "2023-06-20 14:01:35.362233",
+ "doctype": "DocType",
+ "editable_grid": 1,
+ "engine": "InnoDB",
+ "field_order": [
+  "user"
+ ],
+ "fields": [
+  {
+   "fieldname": "user",
+   "fieldtype": "Link",
+   "in_list_view": 1,
+   "label": "User",
+   "options": "User",
+   "reqd": 1,
+   "search_index": 1
+  }
+ ],
+ "index_web_pages_for_search": 1,
+ "istable": 1,
+ "links": [],
+ "modified": "2023-06-26 14:15:34.695605",
+ "modified_by": "Administrator",
+ "module": "Utilities",
+ "name": "Portal User",
+ "owner": "Administrator",
+ "permissions": [],
+ "sort_field": "modified",
+ "sort_order": "DESC",
+ "states": []
+}

erpnext/utilities/doctype/portal_user/portal_user.py

@@ -0,0 +1,9 @@
+# Copyright (c) 2023, Frappe Technologies Pvt. Ltd. and contributors
+# For license information, please see license.txt
+
+# import frappe
+from frappe.model.document import Document
+
+
+class PortalUser(Document):
+	pass