fix: incorrect caching of is_owner permissions (#21048)

- Create a doctype
- Pick any role and only allow owner to create, read, write.
- after_insert hook re-save the document
- This will fail because there's a function call to `frappe.only_has_select_perm` which doesn't pass the is_owner, this is likely acceptable if document is not available.

Fix: cache should be separate for is_owner

Triggered from but not caused by #20810

frappe/permissions.py

@@ -206,7 +206,7 @@ def get_role_permissions(doctype_meta, user=None, is_owner=None):
 	if not user:
 		user = frappe.session.user
 
-	cache_key = (doctype_meta.name, user)
+	cache_key = (doctype_meta.name, user, bool(is_owner))
 
 	if user == "Administrator":
 		return allow_everything()