This commit adds a Go to Url button next to the UrlField input. Since form
views are always set in edition mode, it was no longer possible to open
URLs by clicking on the link. Now, a button has been added directly after
the input to bring back the original feature.
Tests assert the right behavior regarding this button.
X-original-commit: e97215e78500a7b36aa0da073c767f5f96198d3f
Part-of: odoo/odoo#101786