feat: deprecate /superset/validate_sql_json migrate to api v1 (#19935)

* feat: deprecate /superset/validate_sql_json migrate to api v1

* use new error handling

* migrate SQLLAb frontend and add tests

* debug test

* debug test

* fix frontend test on sqllab

* fix tests

* fix frontend test on sqllab

* fix tests

* fix tests

* fix tests

* fix tests

tests/integration_tests/sql_validator_tests.py

@@ -48,13 +48,16 @@ class TestSqlValidatorEndpoint(SupersetTestCase):
     def tearDown(self):
         self.logout()
 
+    @patch.dict(
+        "superset.config.SQL_VALIDATORS_BY_ENGINE",
+        {},
+        clear=True,
+    )
     def test_validate_sql_endpoint_noconfig(self):
         """Assert that validate_sql_json errors out when no validators are
         configured for any db"""
         self.login("admin")
 
-        app.config["SQL_VALIDATORS_BY_ENGINE"] = {}
-
         resp = self.validate_sql(
             "SELECT * FROM birth_names", client_id="1", raise_on_error=False
         )
@@ -231,6 +234,11 @@ class TestPrestoValidator(SupersetTestCase):
 
         self.assertEqual(1, len(errors))
 
+    @patch.dict(
+        "superset.config.SQL_VALIDATORS_BY_ENGINE",
+        {},
+        clear=True,
+    )
     def test_validate_sql_endpoint(self):
         self.login("admin")
         # NB this is effectively an integration test -- when there's a default