[FIX] web: report action: define trusted_host thanks to current URL

To reproduce the issue:
(Need stock. Use demo data)
1. Login as admin
2. Go again on the DB, but using another URL
3. Login as demo
4. Consult the Forecasted Report of [FURN_7800] Desk Combination
5. Try to open "WH/OUT/00009"

Error: Nothing happens although the page should be redirected to the
order. In the browser console, an error message is displayed: "Failed to
execute 'postMessage' on 'DOMWindow': The target origin provided
('http://localhost:8069') does not match the recipient window's origin
('http://yourcompany.com:8069')."

When logging in as admin, the config parameter `web.base.url` is defined
with the URL used (URL01):
https://github.com/odoo/odoo/blob/4736344a57e176ed38f4b22cd100b3957d122818/odoo/addons/base/models/res_users.py#L717-L724

Then, when logging in as demo with another URL (URL02), since he's not
an administrator, the config parameter is not overwritten.
So, when clicking on the delivery order (step 5), an action is executed:
https://github.com/odoo/odoo/blob/b492bde6a121be1c15ed90ce0827fcfd72a12f5c/addons/web/static/src/js/report/report.js#L37-L41
where `trusted_origin` is based on `web.base.url`:
https://github.com/odoo/odoo/blob/2dbe39aed5361341cdc87607e671ef19234e0196/odoo/addons/base/models/ir_actions_report.py#L580
This explains why `trusted_origin` is URL01 and thus why the error is
raised.

Also, suppose `trusted_origin` has a correct value (URL02), there is
another issue: when the client action receives the message, a condition
will ensure that the message origin and the origin of the action are the
same:
https://github.com/odoo/odoo/blob/d3854dbf7a6e0c0f9ac00c11716908bc175808d7/addons/web/static/src/js/report/client_action.js#L73-L76
Here, `this.trusted_origin` is also URL01 because of
https://github.com/odoo/odoo/blob/62f2a62b7265645dee91c276c5171b402c0a44fa/addons/web/models/ir_http.py#L48


So this variable definition needs to be updated too.

OPW-2615024

closes odoo/odoo#79238

Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>