[IMP] stock: rename and add button for inventory adj print

Rename "Inventory" to "Count Sheet" under print dropdown and add in a
"Print Count Sheet" button to inventory adjustment.

This covers specification 2 of inventory usability update.

Task: 2206279
Related Enterprise PR: odoo/enterprise#10723

addons/stock/models/stock_inventory.py

@@ -214,6 +214,9 @@ class Inventory(models.Model):
         }
         return action
 
+    def action_print(self):
+        return self.env.ref('stock.action_report_inventory').report_action(self)
+
     def _get_quantities(self):
         """Return quantities group by product_id, location_id, lot_id, package_id and owner_id
 

addons/stock/report/stock_report_views.xml

@@ -20,7 +20,7 @@
             print_report_name="'Delivery Slip - %s - %s' % (object.partner_id.name or '', object.name)"
         />
         <report
-            string="Inventory"
+            string="Count Sheet"
             id="action_report_inventory"
             model="stock.inventory"
             report_type="qweb-pdf"

addons/stock/views/stock_inventory_views.xml

@@ -168,6 +168,7 @@
                 <button name="action_open_inventory_lines" states="confirm" string="Continue Inventory" type="object" class="oe_highlight" groups="stock.group_stock_user"/>
                 <button name="action_validate" string="Validate Inventory" type="object" attrs="{'invisible': ['|', ('state', '!=', 'confirm'), ('line_ids', '!=', [])]}" groups="stock.group_stock_manager"/>
                 <button name="action_validate" string="Validate Inventory" type="object" attrs="{'invisible': ['|', ('state', '!=', 'confirm'), ('line_ids', '=', [])]}" class="oe_highlight" groups="stock.group_stock_manager"/>
+                <button name="action_print" string="Print Count Sheet" type="object" attrs="{'invisible': [('state', '=', 'draft')]}" groups="stock.group_stock_user"/>
                 <button name="action_cancel_draft" states="cancel" string="Set to Draft" type="object"/>
                 <button name="action_cancel_draft" states="confirm" string="Cancel Inventory" type="object"
                     confirm="If you cancel this inventory adjustment, all its inventory adjustment lines will be lost. Are you sure you want to discard it ?"/>