feat: Added Spark support for Delta and Avro (#2757)

Signed-off-by: Huib Keemink <[email protected]>

Author: creativedutchmen

sdk/python/feast/infra/offline_stores/contrib/spark_offline_store/spark_source.py

@@ -25,6 +25,8 @@ class SparkSourceFormat(Enum):
     csv = "csv"
     json = "json"
     parquet = "parquet"
+    delta = "delta"
+    avro = "avro"
 
 
 class SparkSource(DataSource):