Re-enable Watcher rest tests (#47690)

These tests are believed to be fixed by #43939

closes #45582 and #43975

Author: jakelandis

x-pack/qa/smoke-test-watcher/src/test/resources/rest-api-spec/test/painless/50_update_scripts.yml

@@ -3,8 +3,7 @@
 ---
 "Test transform scripts are updated on execution":
   - skip:
-      version: "all"
-      reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/43975"
+      features: warnings
 
   - do:
       cluster.health:
@@ -80,8 +79,6 @@
 "Test condition scripts are updated on execution":
   - skip:
       features: warnings
-      version: "all"
-      reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/45582"
 
   - do:
       cluster.health: