Checking challange bypass into brave-core

This is being done to simplify the use of challange bypass ffi, as well
as to allow us to modernise the return types to not rely on global
state.

script/brave_license_helper.py

@@ -20,6 +20,7 @@ def AddBraveCredits(root, prune_paths, special_cases, prune_dirs,
     prune_paths.update([
         # Formerly external Brave code which has moved to brave-core
         # (i.e these are already covered by the Brave Browser license notice).
+        os.path.join('brave', 'third_party', 'challenge_bypass_ristretto'),
         os.path.join('brave', 'vendor', 'brave-ios'),
         os.path.join('brave', 'vendor', 'brave_base'),
 
@@ -60,12 +61,6 @@ def AddBraveCredits(root, prune_paths, special_cases, prune_dirs,
             "URL": "https://github.com/brave/brave-extension",
             "License": "MPL-2.0",
         },
-        os.path.join('brave', 'vendor', 'challenge_bypass_ristretto_ffi'): {
-            "Name": "challenge-bypass-ristretto-ffi",
-            "URL":
-                "https://github.com/brave-intl/challenge-bypass-ristretto-ffi",
-            "License": "MPL-2.0",
-        },
         os.path.join('brave', 'vendor', 'web-discovery-project'): {
             "Name": "Web Discovery Project",
             "URL": "https://github.com/brave/web-discovery-project",