Unmute data stream YML tests (#54100)

Author: danhermann

rest-api-spec/src/main/resources/rest-api-spec/test/indices.data_stream/10_basic.yml

@@ -1,8 +1,8 @@
 ---
 "Create data stream":
   - skip:
-      version: "all"
-      reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/54022"
+      version: " - 7.6.99"
+      reason: available only in 7.7+
 
   - do:
       indices.create_data_stream: