[Reporting API] Enable the Reporting API by default

https://bugs.webkit.org/show_bug.cgi?id=245197
<rdar://problem/99937109>

Reviewed by Chris Dumez.

Now that we pass the Reporting API tests, and the Content Security Policy reporting tests,
we should enable by default so we can start tracking it in STP.

* Source/WTF/Scripts/Preferences/WebPreferencesExperimental.yaml:

Canonical link: https://commits.webkit.org/254520@main

Source/WTF/Scripts/Preferences/WebPreferencesExperimental.yaml

@@ -1348,11 +1348,11 @@ ReportingEnabled:
   humanReadableDescription: "Enable Reporting API"
   defaultValue:
     WebKitLegacy:
-      default: false
+      default: true
     WebKit:
-      default: false
+      default: true
     WebCore:
-      default: false
+      default: true
 
 RequestIdleCallbackEnabled:
   type: bool