Fix: remove leftover profile rights and config on uninstall

[Rom1-B]

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

• fixes #N/A
• Uninstalling the plugin used to leave 45 rows in glpi_profilerights because the uninstall routine never removed the rights it had registered, and 2 rows in glpi_configs because a migration call passed a list instead of a key/value pair, which made GLPI store the config under numeric keys that the uninstall cleanup did not know about.
• The uninstall routine now removes the profile rights, and the migration call is fixed to use the correct key/value syntax so the config values are stored and cleaned up under their real names.

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