Split get data stream api yaml test in two tests. (#81648)

Backporting #81590 to 7.17 branch.

Split yaml test that verifies allow_custom_routing and replicated fields are included in get data stream api.
This is because `allow_custom_routing` field is only included from 8.0 and
`replicated` field is only included from 7.16. Each test has its own skip version section.
The current test was reused in bwc qa tests, which caused test failures.

Closes #81462

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/data_stream/10_basic.yml

@@ -622,10 +622,10 @@ setup:
         index: logs-foobar
 
 ---
-"Get data stream api check existence of replicated and allow_custom_routing fields":
+"Get data stream api check existence of replicated field":
   - skip:
-      version: all
-      reason: "https://github.com/elastic/elasticsearch/issues/81462"
+      version: " - 7.16.0"
+      reason: "replicated field only supported from 7.16+ and later"
 
   - do:
       indices.create_data_stream:
@@ -649,7 +649,6 @@ setup:
   - match: { data_streams.0.template: 'my-template1' }
   - match: { data_streams.0.hidden: false }
   - match: { data_streams.0.replicated: false }
-  - match: { data_streams.0.allow_custom_routing: false }
   - match: { data_streams.1.name: simple-data-stream2 }
   - match: { data_streams.1.timestamp_field.name: '@timestamp' }
   - match: { data_streams.1.generation: 1 }
@@ -658,7 +657,6 @@ setup:
   - match: { data_streams.1.template: 'my-template2' }
   - match: { data_streams.1.hidden: false }
   - match: { data_streams.1.replicated: false }
-  - match: { data_streams.1.allow_custom_routing: false }
 
   - do:
       indices.delete_data_stream:
@@ -669,4 +667,3 @@ setup:
       indices.delete_data_stream:
         name: simple-data-stream2
   - is_true: acknowledged
-