use date and date_nanos implicit casting capability instead

Author: limotova

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -1215,12 +1215,7 @@ public enum Cap {
         /**
          * (Re)Added EXPLAIN command
          */
-        EXPLAIN(Build.current().isSnapshot()),
-
-        /**
-         * Enable yaml test for suggested cast properly
-         */
-        SUGGESTED_CAST_YAML_TEST;
+        EXPLAIN(Build.current().isSnapshot());
 
         private final boolean enabled;
 

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/160_union_types.yml

@@ -913,8 +913,8 @@ suggested_type:
         - method: POST
           path: /_query
           parameters: []
-          capabilities: [suggested_cast_yaml_test]
-      reason: "was using incorrect capabilities name and being skipped before"
+          capabilities: [implicit_casting_date_and_date_nanos]
+      reason: "date and date_nanos should no longer produce suggested_cast column"
 
   - do:
       indices.create: