[FIX] website: enable to use quotation mark for field labels of form

Steps to reproduce the bug:
- Drop the "Form" snippet on the website.
- Add a new field.
- Replace the field label by two quotation marks (`""`).
=> Traceback appears.

Since [1], it is possible for the user to create forms whose fields can
have a conditional visibility, meaning that the field is only visible if
another field in the form meets certain conditions. Due to that, there
is a mechanism that verifies if a condition on a field should be updated
when the user modifies the label of a field. To do so, a `querySelector`
is searching for an element that has a `data-visibility-dependency` set
to the previous field name by doing a querySelector of type
`querySelectorAll('.s_website_form_field[data-visibility-dependency="${previousInputName}"]')`.
Because `previousInputName` is set to `"`, it is not considered as a
character and an error is thrown.
To resolve this problem, strings that are stored in `name`, `data-name`
and `data-visibility-dependency` are encoded: All the occurrences of `"`
are replaced by `"`, all the occurrences of `'` are replaced by
`'` and all the occurrences of ``` ` ``` are replaced by `‘`.

[1]: https://github.com/odoo/odoo/commit/2dcbfecf3c10687a2cd3af36335d5be70c904fce



opw-3246341

closes odoo/odoo#117632

Signed-off-by: Romain Derie (rde) <rde@odoo.com>