[Tests] Move templated _rank_eval tests (#30679)

This change moves the ranking evaluation tests that use templates to the
existing yml rest tests instead of extending ESIntegTestCase.

Closes #30628

Author: Christoph Büscher

qa/smoke-test-rank-eval-with-mustache/build.gradle

@@ -31,6 +31,3 @@ dependencies {
  * and will be fixed later.
  * Tracked by https://github.com/elastic/elasticsearch/issues/30628
  */
-if ("zip".equals(integTestCluster.distribution)) {
-    integTestRunner.enabled = false
-}

qa/smoke-test-rank-eval-with-mustache/src/test/java/org/elasticsearch/index/rankeval/SmokeMultipleTemplatesIT.java

@@ -0,0 +1,171 @@
+setup:
+
+  - do:
+     indices.create:
+         index: test
+         body:
+           settings:
+             index:
+               number_of_shards: 1
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      1
+        body:    { "text": "berlin", "title" : "Berlin, Germany" }
+
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      2
+        body:   { "text": "amsterdam" }
+
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      3
+        body:   { "text": "amsterdam" }
+
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      4
+        body:   { "text": "amsterdam" }
+
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      5
+        body:   { "text": "amsterdam" }
+
+  - do:
+      index:
+        index:   test
+        type:    _doc
+        id:      6
+        body:   { "text": "amsterdam" }
+
+  - do:
+      indices.refresh: {}
+
+---
+"Basic rank-eval request with template":
+
+  - skip:
+      version: " - 6.1.99"
+      reason: the ranking evaluation feature is available since 6.2
+
+  - do:
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{\"query\": { \"match\" : {\"text\" : \"{{query_string}}\" }}}" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": [
+                    {"_index": "test", "_id": "2", "rating": 1},
+                    {"_index": "test", "_id": "3", "rating": 1},
+                    {"_index": "test", "_id": "4", "rating": 1},
+                    {"_index": "test", "_id": "5", "rating": 1},]
+            },
+            {
+                "id" : "berlin_query",
+                "params": { "query_string": "berlin" },
+                "template_id": "match",
+                "ratings": [{"_index": "test", "_id": "1", "rating": 1}]
+            }
+          ],
+          "metric" : { "precision": { }}
+        }
+
+  - match: {quality_level: 0.9}
+  - match: {details.amsterdam_query.unknown_docs.0._id:  "6"}
+
+---
+"Test illegal request parts":
+
+  - do:
+      catch: /Query in rated requests should not contain aggregations./
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{ \"aggs\" : { \"avg_grade\" : { \"avg\" : { \"field\" : \"grade\" }}}}" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": []
+            }
+          ],
+          "metric" : { "precision": { }}
+        }
+
+  - do:
+      catch: /Query in rated requests should not contain a suggest section./
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{\"suggest\" : {\"my-suggestion\" : {\"text\" : \"Elastic\",\"term\" : {\"field\" : \"message\"}}}}" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": []
+            }
+          ],
+          "metric" : { "precision": { }}
+        }
+
+  - do:
+      catch: /Query in rated requests should not contain a highlighter section./
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{\"highlight\" : { \"fields\" : {\"content\" : {}}}}" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": []
+            }
+          ],
+          "metric" : { "precision": { }}
+        }
+
+  - do:
+      catch: /Query in rated requests should not use profile./
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{\"profile\" : \"true\" }" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": []
+            }
+          ],
+          "metric" : { "precision": { }}
+        }
+
+  - do:
+      catch: /Query in rated requests should not use explain./
+      rank_eval:
+        body: {
+          "templates": [ { "id": "match", "template": {"source": "{\"explain\" : \"true\" }" }} ],
+          "requests" : [
+            {
+                "id": "amsterdam_query",
+                "params": { "query_string": "amsterdam" },
+                "template_id": "match",
+                "ratings": []
+            }
+          ],
+          "metric" : { "precision": { }}
+        }