REST: Fix script-expressions test to work with Perl

Closes #9931

rest-api-spec/test/script/30_expressions.yaml

@@ -1,8 +1,5 @@
 ---
 setup:
-  - skip:
-       version:     "0 - 100"
-       reason:      Java returns floating point, but JSON returns integer
   - do:
       indices.create:
         index: test123
@@ -26,5 +23,5 @@ setup:
 "Expressions scripting test":
 
   - do: { search: { body: { script_fields : { my_field : { lang: expression, script: 'doc["age"].value' } } } } }
-  - match:  { hits.hits.0.fields.my_field: [ 23 ] }
+  - match:  { hits.hits.0.fields.my_field.0: 23.0 }