Purpose: use more email_formatted when possible, clean and simplify
email_from, email_to and partner_to computation.
Next step is to try to extract some common patterns in tools or methods in
order to simplify template creation and customization.
Related to task 1972615
Linked to PR #32872
Email validation was necessary on the forum to be able to begin to use the forum
(ask or answer questions, vote, etc..)
As the new elearning also uses karma since 705376a982,
the email validation is now also necessary in the eLearning platform.
This is why this commit is moving the email validation process to website_profile
and extend website_slides (eLearning) and website_forum to use this feature.
In function of where the user asked to send him the validation email,
the user is redirected on the forum or on the elearning when he clicks on
'Validate my account' in the received 'email validation' email.
Task ID : 1943788
PR #31321
Thibault Delavallée