[IMP] web_editor, base: allow parameters in image URLs

When adding an image to the library from an URL, if the URL contains
parameters (e.g. ?width=200&height=200), the link will not be accepted.

In this commit, we remove these parameters from the URL before checking
the image, so that the URL is considered valid.
We also remove these parameters before computing the mimetype of the
image, since it is computed based on the end part of the URL.

task-2618494

Part-of: odoo/odoo#75205

addons/web_editor/static/src/js/wysiwyg/widgets/media.js

@@ -658,7 +658,7 @@ var FileWidget = SearchableMediaWidget.extend({
      * @private
      */
     _onURLInputChange: function () {
-        var inputValue = this.$urlInput.val();
+        const inputValue = this.$urlInput.val().split('?')[0];
         var emptyValue = (inputValue === '');
 
         var isURL = /^.+\..+$/.test(inputValue); // TODO improve

odoo/addons/base/models/ir_attachment.py

@@ -283,7 +283,7 @@ class IrAttachment(models.Model):
         if not mimetype and values.get('name'):
             mimetype = mimetypes.guess_type(values['name'])[0]
         if not mimetype and values.get('url'):
-            mimetype = mimetypes.guess_type(values['url'])[0]
+            mimetype = mimetypes.guess_type(values['url'].split('?')[0])[0]
         if not mimetype or mimetype == 'application/octet-stream':
             raw = None
             if values.get('raw'):