Drop skip on test after backporting fix

Fixed in 98c379c.

Closes #57402

Author: nik9000

rest-api-spec/src/main/resources/rest-api-spec/test/msearch/20_typed_keys.yml

@@ -90,9 +90,6 @@ setup:
 
 ---
 "Multisearch test with typed_keys parameter for sampler and significant terms":
-  - skip:
-      version: "all"
-      reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/57402"
   - do:
       msearch:
         rest_total_hits_as_int: true