[FIX] project: remove import button in favorite menu for project sharing

Before this commit, the portal user can see this button, but this button
should not be accessible by collaborators.

This commit removes the import button in project sharing feature to not
allow this to collaborators.

task-2633229

closes #77156

X-original-commit: 74d7308dfb8df0b923e68aa228ec406e36b0b89a

addons/project/views/project_sharing_views.xml

@@ -27,6 +27,7 @@
                 on_create="quick_create"
                 quick_create_view="project.project_sharing_quick_create_task_form"
                 archivable="0"
+                import="0"
             >
                 <field name="color"/>
                 <field name="priority"/>
@@ -115,7 +116,7 @@
         <field name="model">project.task</field>
         <field name="priority">999</field>
         <field name="arch" type="xml">
-            <tree string="Tasks" sample="1" delete="0">
+            <tree string="Tasks" sample="1" delete="0" import="0">
                 <field name="is_closed" invisible="1" />
                 <field name="allow_subtasks" invisible="1" />
                 <field name="sequence" invisible="1" readonly="1"/>