add ad related fields to branch.io connector#912

Hi,

To ensure seamless integration of Branch conversion data with other advertising platforms (DV360, Facebook Ads, and Google Ads). Could you please add these fields?

Required fields:
advertising_partner_name
channel
campaign_id
campaign
tags
secondary_publisher
ad_id
ad_name
ad_format
ad_set_id
ad_set_name
creative_id
creative_name
keyword
placement

Lifestyle events and conversion numbers:
COMPLETE_REGISTRATION
Login

Custom events:
custom event name & conversion number