ReVantage Bid Adapter: Add gvlid (#6551)

* Add Revantage Bidder Adapter documentation

Added documentation for the Revantage Bidder Adapter, including registration, bid parameters, configuration for banner and video ads, user syncing, privacy support, and price floors.

* Remove notes about bid requests and sync URLs

Removed notes section detailing bid requests and notifications.

* Update dev-docs/bidders/revantage.md

Co-authored-by: Muki Seiler <muuki88@users.noreply.github.com>

* Update dev-docs/bidders/revantage.md

Co-authored-by: Muki Seiler <muuki88@users.noreply.github.com>

* Change tcfeu_supported to false for Revantage

* Update Revantage documentation with code examples

* Set GVL ID to 1588 for Revantage

Updated GVL ID for Revantage bidder adapter.

* tcfeu_supported true

---------

Co-authored-by: Muki Seiler <muuki88@users.noreply.github.com>

Author: v0idxyz

dev-docs/bidders/revantage.md

@@ -3,8 +3,8 @@ layout: bidder
 title: Revantage
 description: Prebid Revantage Bidder Adapter
 biddercode: revantage
-tcfeu_supported: false
-gvl_id: none
+tcfeu_supported: true
+gvl_id: 1588
 usp_supported: true
 gpp_sids: tcfeu, tcfca, usnat, usstate_all, usp
 coppa_supported: false