[Schema Registry Avro] Move recordings to assets repo (Azure#27935)

Author: mccoyp

sdk/schemaregistry/azure-schemaregistry-avroencoder/assets.json

@@ -0,0 +1,6 @@
+{
+  "AssetsRepo": "Azure/azure-sdk-assets",
+  "AssetsRepoPrefixPath": "python",
+  "TagPrefix": "python/schemaregistry/azure-schemaregistry-avroencoder",
+  "Tag": "python/schemaregistry/azure-schemaregistry-avroencoder_9094577785"
+}