Chore: rework ad props (#4220)

* fix: move ad configuration in source

ios/Video/RCTVideo.swift

@@ -86,8 +86,6 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
     }
 
     /* IMA Ads */
-    private var _adTagUrl: String?
-    private var _adLanguage: String?
     #if USE_GOOGLE_IMA
         private var _imaAdsManager: RCTIMAAdsManager!
         /* Playhead used by the SDK to track content video progress and insert mid-rolls. */
@@ -374,7 +372,7 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
 
         if currentTimeSecs >= 0 {
             #if USE_GOOGLE_IMA
-                if !_didRequestAds && currentTimeSecs >= 0.0001 && _adTagUrl != nil {
+                if !_didRequestAds && currentTimeSecs >= 0.0001 && _source?.adParams.adTagUrl != nil {
                     _imaAdsManager.requestAds()
                     _didRequestAds = true
                 }
@@ -527,7 +525,7 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
         }
 
         #if USE_GOOGLE_IMA
-            if _adTagUrl != nil {
+            if _source?.adParams.adTagUrl != nil {
                 // Set up your content playhead and contentComplete callback.
                 _contentPlayhead = IMAAVPlayerContentPlayhead(avPlayer: _player!)
 
@@ -1216,16 +1214,11 @@ class RCTVideo: UIView, RCTVideoPlayerViewControllerDelegate, RCTPlayerObserverH
     // MARK: - RCTIMAAdsManager
 
     func getAdLanguage() -> String? {
-        return _adLanguage
+        return _source?.adParams.adLanguage
     }
 
     func getAdTagUrl() -> String? {
-        return _adTagUrl
-    }
-
-    @objc
-    func setAdTagUrl(_ adTagUrl: String?) {
-        _adTagUrl = adTagUrl
+        return _source?.adParams.adTagUrl
     }
 
     #if USE_GOOGLE_IMA