feat(core): google pay decrypt flow (#6991)

Co-authored-by: hyperswitch-bot[bot] <148525504+hyperswitch-bot[bot]@users.noreply.github.com>
Co-authored-by: Gnanasundari24 <118818938+Gnanasundari24@users.noreply.github.com>

crates/masking/src/secret.rs

@@ -156,3 +156,10 @@ where
         SecretValue::default().into()
     }
 }
+
+// Required by base64-serde to serialize Secret of Vec<u8> which contains the base64 decoded value
+impl AsRef<[u8]> for Secret<Vec<u8>> {
+    fn as_ref(&self) -> &[u8] {
+        self.peek().as_slice()
+    }
+}