Update to v7.11.0

[github-actions]

Automated changes by create-pull-request GitHub action

[antoineco]

Something possibly changed in Enterprise Search. The CI fails with

[+] Retrieving private key from Elasticsearch

null
.github/workflows/scripts/run-tests-enterprise-search.sh: line 27: null: unbound variable
Error: Process completed with exit code 1.

I'll take a look later.

---

edit: found it. The index's suffix has changed from _v2 to _v3, and the API keys are now (finally) encrypted.

$ curl -sD- -u elastic:changeme 'http:https://localhost:9200/_search?q=name:private-key&pretty'

HTTP/1.1 200 OK
Warning: 299 Elasticsearch-7.11.0-8ced7813d6f16d2ef30792e2fcde3e755795ee04 "this request accesses system indices: [.security-7, .triggered_watches, .watches], but in a future major version, direct access to system indices will be prevented by default"
content-type: application/json; charset=UTF-8
content-length: 1275

{
  "took" : 24,
  "timed_out" : false,
  "_shards" : {
    "total" : 92,
    "successful" : 92,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 0.6931471,
    "hits" : [
      {
        "_index" : ".ent-search-actastic-app_search_api_tokens_v3",
        "_type" : "_doc",
        "_id" : "loco_moco_account_id:6025038252b42a46f77aeb32|name:private-key",
        "_score" : 0.6931471,
        "_source" : {
          "id" : "loco_moco_account_id:6025038252b42a46f77aeb32|name:private-key",
          "created_at" : "2021-02-11T10:14:26Z",
          "updated_at" : "2021-02-11T10:14:26Z",
          "loco_moco_account_id" : "6025038252b42a46f77aeb32",
          "authentication_token" : {
            "hash" : "e6fdada3481f795b55dc0e6fb5742f376398d0e5056607c93390703c939f3b45",
            "ciphertext" : "YnZZRXVXcWhLYTQvdWtmekROVXZ0eVN5UC9Ock9xbmJ1WmlVTCtGMTQ0bTM3TyttUWthTS9sS21hUUJ1b2F1SC0tSmx6S2RqTzQyKzRDOG5HQTluVWxUdz09--6927142cb8ee2d913da18d646a235ee0d4bedb8b"
          },
          "read_access" : true,
          "write_access" : true,
          "access_all_engines" : true,
          "name" : "private-key",
          "token_type" : "private"
        }
      }
    ]
  }
}