fix: field wildcard for child object

[klahap]

Hi,

When loading child objects with fields=["*"] via the REST API, only standard fields are returned. india081947 has already described the same bug in #25441.

Example

request: {{base-url}}/api/resource/Web Form Field?fields=["*"]&parent=Web Form

function trace:

1. frappe.api.v1.document_list
2. frappe.client.get_list : here the parent-doctype-name is saved with the key "parent_doctype"
3. frappe.desk.reportview.validate_args
4. frappe.desk.reportview.validate_fields
5. frappe.desk.reportview.update_wildcard_field_param : here the parent-doctype-name is loaded with the key "parenttype", but this key does not exist -> None

response with bug

{
    "data": [
        {
            "name": "e3bn1at0sb",
            "owner": "Administrator",
            "creation": "2016-09-19 05:16:59.242754",
            "modified": "2024-04-25 18:05:49.539971",
            "modified_by": "Administrator",
            "docstatus": 0,
            "idx": 1
        }
    ]
}

response without bug

{
    "data": [
        {
            "name": "e3bn1at0sb",
            "owner": "Administrator",
            "creation": "2016-09-19 05:16:59.242754",
            "modified": "2024-04-25 18:05:49.539971",
            "modified_by": "Administrator",
            "docstatus": 0,
            "idx": 1,
            "parent": "edit-profile",
            "parentfield": "web_form_fields",
            "parenttype": "Web Form",
            "fieldname": "first_name",
            "fieldtype": "Data",
            "label": "First Name",
            "allow_read_on_all_link_options": 0,
            "reqd": 1,
            "read_only": 0,
            "show_in_filter": 0,
            "hidden": 0,
            "options": null,
            "max_length": 0,
            "max_value": 0,
            "precision": null,
            "depends_on": null,
            "mandatory_depends_on": null,
            "read_only_depends_on": null,
            "description": null,
            "default": null
        }
    ]
}