[TEST] Mute 60_ml_config_migration rolling upgrade

AwaitsFix: #36810

This test fails on the upgraded cluster in 6.x (details in #36810)

Author: tvernum

x-pack/qa/rolling-upgrade/src/test/resources/rest-api-spec/test/upgraded_cluster/60_ml_config_migration.yml

@@ -8,6 +8,9 @@ setup:
 
 ---
 "Test old cluster jobs and datafeeds and delete them":
+  - skip:
+      version: "all"
+      reason: "@AwaitsFix: https://github.com/elastic/elasticsearch/issues/36810"
 
   - do:
       xpack.ml.get_jobs: