Add project_routing param to _project/tags (#5730)

* Add project_routing param to _project/tags

Author: smalyshev

output/openapi/elasticsearch-serverless-openapi.json

@@ -13,9 +13,15 @@
       "paths": [
         {
           "path": "/_project/tags",
-          "methods": ["GET"]
+          "methods": ["GET", "POST"]
         }
       ]
+    },
+    "params": {
+      "project_routing": {
+        "type": "string",
+        "description": "A Lucene query using project metadata tags used to filter which projects are returned in the response, such as _alias:_origin or _alias:*pr*."
+      }
     }
   }
 }

output/schema/schema.json

@@ -33,7 +33,14 @@ export interface Request extends RequestBase {
   urls: [
     {
       path: '/_project/tags'
-      methods: ['GET']
+      methods: ['GET', 'POST']
     }
   ]
+  query_parameters: {
+    /**
+     * A Lucene query using project metadata tags used to filter which projects are returned in the response, such as _alias:_origin or _alias:*pr*.
+     * @availability serverless stability=experimental visibility=public
+     */
+    project_routing?: string
+  }
 }