UID2-2885 Optout UI Improvement

[swibi-ttd]

API Changes:

• GET /api/partner_config/list - List all partner configs
• GET /api/partner_config/get/{partner_name} - Get specific partner config
• POST /api/partner_config/add - Add new partner
• PUT /api/partner_config/update - Update existing partner
• DELETE /api/partner_config/delete - Delete partner
• POST /api/partner_config/bulk_replace - Replace all configs (renamed from update and moved to Danger Zone)

UI Changes:

• Updated operations in OptOut Partner Management page to reflect API changes