Bad date range tests rely on shard count (elastic#138963)

Search by default only fails if all shards fail, use `allow_partial_search_results: false` for tests
validation that search fails.

Author: henningandersen

rest-api-spec/src/yamlRestTest/resources/rest-api-spec/test/search/500_date_range.yml

@@ -133,6 +133,7 @@ setup:
       catch: /illegal_argument_exception/
       search:
         index: dates
+        allow_partial_search_results: false
         body:
           sort: field
           query:
@@ -151,6 +152,7 @@ setup:
       catch: /illegal_argument_exception/
       search:
         index: dates
+        allow_partial_search_results: false
         body:
           sort: field
           query: