[FIX] purchase: fix mail templates for multi-company use

Activate multi-company, deactivate the common contact book.
Create a PO P with user U1 in company A. Switch to company B.
User U2 in company A tries to send P by email.
Rendering of the template fails, because it tries to access object.create_uid,
which breaks multi-company record rules.

We add a sudo in the template so that it works as intended.

opw 1930521

closes odoo/odoo#30789

addons/purchase/data/mail_template_data.xml

@@ -5,7 +5,7 @@
             <field name="name">Purchase Order: Send RFQ</field>
             <field name="model_id" ref="purchase.model_purchase_order"/>
             <field name="subject">${object.company_id.name} Order (Ref ${object.name or 'n/a' })</field>
-            <field name="email_from">${object.create_uid.email_formatted | safe}</field>
+            <field name="email_from">${object.sudo().create_uid.email_formatted | safe}</field>
             <field name="partner_to">${object.partner_id.id}</field>
             <field name="body_html" type="html">
 <div style="margin: 0px; padding: 0px;">
@@ -37,7 +37,7 @@
             <field name="name">Purchase Order: Send PO</field>
             <field name="model_id" ref="purchase.model_purchase_order"/>
             <field name="subject">${object.company_id.name} Order (Ref ${object.name or 'n/a' })</field>
-            <field name="email_from">${object.create_uid.email_formatted | safe}</field>
+            <field name="email_from">${object.sudo().create_uid.email_formatted | safe}</field>
             <field name="partner_to">${object.partner_id.id}</field>
             <field name="body_html" type="html">
 <div style="margin: 0px; padding: 0px;">