[CLN] payment(_*): clean view hooks and split files per model

When the payment views were updated with commit odoo/odoo@f7b8f075, a
hook was improperly renamed to `code`, which doesn't help to figure out
its purpose. This commit renames it to `provider_credentials` which
better fits its role.

While doing so, the view files are also renamed and/or split by model to
increase their readability.

closes odoo/odoo#102976

X-original-commit: 49d126d4fce18761d0261adac00e115b840b9b47
Related: odoo/enterprise#32662
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

addons/payment_buckaroo/__manifest__.py

@@ -9,8 +9,9 @@
     'description': """Buckaroo Payment Provider""",
     'depends': ['payment'],
     'data': [
-        'views/payment_views.xml',
         'views/payment_buckaroo_templates.xml',
+        'views/payment_provider_views.xml',
+
         'data/payment_provider_data.xml',
     ],
     'application': True,

addons/payment_buckaroo/views/payment_provider_views.xml

@@ -6,7 +6,7 @@
         <field name="model">payment.provider</field>
         <field name="inherit_id" ref="payment.payment_provider_form"/>
         <field name="arch" type="xml">
-            <group name="code" position='inside'>
+            <group name="provider_credentials" position='inside'>
                 <group attrs="{'invisible': [('code', '!=', 'buckaroo')]}">
                     <field name="buckaroo_website_key" attrs="{'required':[ ('code', '=', 'buckaroo'), ('state', '!=', 'disabled')]}"/>
                     <field name="buckaroo_secret_key" string="Secret Key" attrs="{'required':[ ('code', '=', 'buckaroo'), ('state', '!=', 'disabled')]}" password="True"/>