Fix - Loss of profile rights when updating the plugin

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !42046
• Here is a brief description of what this PR does

Problem

The addRightToAllProfiles() and addRightToProfile() functions use updateOrInsert(), which overwrites existing rights each time the plugin is updated.

Solution

Both functions now check whether the entry already exists before inserting:

• If the entry exists → no change (configured rights are retained)
• If the entry does not exist → insertion with default rights

[Rom1-B]

You should be able to simplify it with getFromDBByCrit().

Suggested change

	return $this->getFromDBByCrit(['profiles_id' => $profiles_id]);

[RomainLvr]

I had also thought about using getFromDBByCrit(), but the problem is that if the query returns multiple results (which is the case here), the function triggers an error.