feat: add wata payment provider

tests/test_build_services_wiring.py

@@ -131,6 +131,7 @@ class BuildServicesWiringTests(unittest.TestCase):
             "lknpd_service",
             "platega_service",
             "severpay_service",
+            "wata_service",
         }
         self.assertEqual(set(services), expected_keys)
 

tests/test_provider_labels.py

@@ -25,6 +25,7 @@ _PROVIDERS_FROM_CALLERS = {
     "freekassa",
     "platega",
     "severpay",
+    "wata",
     "cryptopay",
     "telegram_stars",
 }