[FIX] website_hr_recruitment: prevent applying for unpublished job

Issue:
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When we have the link to the form to apply for a job,
even if the job is not published, we can still apply.

Solution:
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Check that the job is published before the creation of the record
in the `website_form_input_filter`.

opw-3331717

closes odoo/odoo#124399

Signed-off-by: Kevin Baptiste <kba@odoo.com>