Add spec for EQL allow_partial_search_results (#3342)

(cherry picked from commit 5987f79)

Author: luigidellaquila

output/openapi/elasticsearch-openapi.json

@@ -394,6 +394,8 @@
     "eql.search": {
       "request": [
         "Request: query parameter 'allow_no_indices' does not exist in the json spec",
+        "Request: query parameter 'allow_partial_search_results' does not exist in the json spec",
+        "Request: query parameter 'allow_partial_sequence_results' does not exist in the json spec",
         "Request: query parameter 'expand_wildcards' does not exist in the json spec",
         "Request: query parameter 'ignore_unavailable' does not exist in the json spec"
       ],

output/openapi/elasticsearch-serverless-openapi.json

@@ -43,6 +43,17 @@ export interface Request extends RequestBase {
      * @server_default true
      */
     allow_no_indices?: boolean
+    /**
+     * If true, returns partial results if there are shard failures. If false, returns an error with no partial results.
+     * @server_default false
+     */
+    allow_partial_search_results?: boolean
+    /**
+     * If true, sequence queries will return partial results in case of shard failures. If false, they will return no results at all.
+     * This flag has effect only if allow_partial_search_results is true.
+     * @server_default false
+     */
+    allow_partial_sequence_results?: boolean
     /**
      * @server_default open
      */
@@ -100,6 +111,8 @@ export interface Request extends RequestBase {
     keep_alive?: Duration
     keep_on_completion?: boolean
     wait_for_completion_timeout?: Duration
+    allow_partial_search_results?: boolean
+    allow_partial_sequence_results?: boolean
     /**
      * For basic queries, the maximum number of matching events to return. Defaults to 10
      * @doc_id eql-basic-syntax