[FIX] web,*: phone number ltr even in rtl language

Currently there is two ways in view to have a phone number displayed in
LTR in a RTL language:

- have `widget="phone"` on a field
- have a class o_force_ltr on the field

But this is currently done very rarely and fail in list view because the
direction of data cells is used, eg.:

```
<div style="direction:rtl">
  <table><tr><td style="direction:ltr">
      <span>+1 2 3</span>
  </td></tr><tr><td>
      <span style="direction:ltr">+4 5 6</span>
  </td>/tr></table>
</div>
```

will be displayed as:

+1 2 3
6 5 4+

In this commit, we use unicode-bidi* to optionally add an additional
level of embedding so direction is taken into account by the
bidirectional algorithm.

This commit also adds o_force_ltr class or phone widget on phone fields
where it is not already defined.

*: https://drafts.csswg.org/css-writing-modes-3/#propdef-unicode-bidi

opw-2224828
closes #48425

closes odoo/odoo#48588

X-original-commit: ab067218e069f0a92610c3f0d4137e563e47755c
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/crm/wizard/crm_merge_opportunities_views.xml

@@ -18,7 +18,7 @@
                                 <field name="type"/>
                                 <field name="contact_name"/>
                                 <field name="email_from"/>
-                                <field name="phone"/>
+                                <field name="phone" class="o_force_ltr"/>
                                 <field name="stage_id"/>
                                 <field name="user_id"/>
                                 <field name="team_id"/>