Move integration serde serializer tests to the integration tests directory

Author: Mingun

Cargo.toml

@@ -186,6 +186,10 @@ required-features = ["serialize"]
 name = "serde-de"
 required-features = ["serialize"]
 
+[[test]]
+name = "serde-se"
+required-features = ["serialize"]
+
 [[test]]
 name = "serde-migrated"
 required-features = ["serialize"]