[FIX] mail, web_editor: allow tel links in email templates (#24926)

Before this commit: links like `tel:+1-555-555-5555` were being replaced
both in javascript (prefixing `http`, when using the summernote editor)
and python (prefixing the base url, when they were added directly to the template).

After this commit: the replacement is avoided on links with `tel` scheme.

This is related to commit: 8b97a39

addons/mail/models/mail_template.py

@@ -300,7 +300,7 @@ class MailTemplate(models.Model):
 
         def _process_link(url):
             new_url = urls.url_parse(url)
-            if new_url.scheme and (new_url.netloc or new_url.scheme == 'mailto'):
+            if new_url.scheme and (new_url.netloc or new_url.scheme in ['mailto', 'tel']):
                 return url
             return new_url.replace(scheme=base.scheme, netloc=base.netloc).to_url()
 

addons/web_editor/static/src/js/editor/summernote.js

@@ -2268,7 +2268,7 @@ $.summernote.pluginEvents.backColor = function (event, editor, layoutInfo, backC
 };
 
 options.onCreateLink = function (sLinkUrl) {
-    if (sLinkUrl.indexOf('mailto:') === 0) {
+    if (sLinkUrl.indexOf('mailto:') === 0 || sLinkUrl.indexOf('tel:') === 0) {
       // pass
     } else if (sLinkUrl.indexOf('@') !== -1 && sLinkUrl.indexOf(':') === -1) {
       sLinkUrl =  'mailto:' + sLinkUrl;