[FIX] payment: move notebook outside group

Usually in a form view, a notebook is not placed within group/s.

Also, using studio we don't let user drop notebook in a group since it
generates issues with the notebook.(See https://github.com/odoo/enterprise/commit/ea5ccd548bb6781e5ccdf76cf11255c6fd6aa3cb)

This commit fixes the issue by moving notebook out of the group and making
the 'payment.icon' form view structure consistent(and properly
editable with studio).

task - 2060330

X-original-commit: c4efe0173478be8b6a643d5fefef4244384ea6c2

addons/payment/views/payment_views.xml

@@ -404,13 +404,11 @@
                         <div class="oe_title">
                             <h1><field name="name" placeholder="Name"/></h1>
                         </div>
-                        <group>
-                            <notebook>
-                                <page string="Acquirers list">
-                                    <field nolabel="1" name="acquirer_ids"/>
-                                </page>
-                            </notebook>
-                        </group>
+                        <notebook>
+                            <page string="Acquirers list">
+                                <field nolabel="1" name="acquirer_ids"/>
+                            </page>
+                        </notebook>
                     </sheet>
                 </form>
             </field>