[FIX] don't traceback when origin is not filled

[thomaspaulb]

Description of the issue/feature this PR addresses:

In some cases, orderpoint_id is filled but origin is not. I have no idea which exact flows lead to this, but I notice it is fixed in future Odoo versions as part of odoo/pull/80319. I'm not sure about backporting all of that, but at least this part is IMO harmless to just merge in.

Current behavior before PR:

Upon confirming an MO with orderpoint_id but no origin:

  File "/home/ubuntu/odoo/auto/addons/mrp/models/mrp_production.py", line 968, in _get_move_raw_values
    origin = self.origin.replace(
Exception
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/home/ubuntu/odoo/custom/src/odoo/odoo/http.py", line 652, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/ubuntu/odoo/custom/src/odoo/odoo/http.py", line 317, in _handle_exception
    raise exception.with_traceback(None) from new_cause
AttributeError: 'bool' object has no attribute 'replace'

Desired behavior after PR is merged:

No traceback, MO confirms OK

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[JBvandermeulen]

Issue is fixed!