7.17.1 release changelog

* 7.17.1 as default version.

| PR                                                        | Author                                       | Title                                                                   |
|-----------------------------------------------------------|----------------------------------------------|-------------------------------------------------------------------------|
| [elastic#1604](elastic#1604) | [@jmlrt](https://github.com/jmlrt)           | [meta] update docker images                                             |
| [elastic#1603](elastic#1603) | [@jmlrt](https://github.com/jmlrt)           | [metricbeat] add missing rolebinding and cluster role rules             |
| [elastic#1602](elastic#1602) | [@jmlrt](https://github.com/jmlrt)           | [filebeat] add missing rolebinding and cluster role rules               |
| [elastic#1593](elastic#1593) | [@jmlrt](https://github.com/jmlrt)           | [meta] add support for k8s 1.22                                         |
| [elastic#1582](elastic#1582) | [@jmlrt](https://github.com/jmlrt)           | [kibana] fix extra values default values                                |
| [elastic#1581](elastic#1581) | [@jmlrt](https://github.com/jmlrt)           | [logstash] fix ServiceAccount inconsistencies                           |
| [elastic#1580](elastic#1580) | [@jmlrt](https://github.com/jmlrt)           | [elasticsearch] fix ServiceAccount inconsistencies                      |
| [elastic#1570](elastic#1570) | [@jmlrt](https://github.com/jmlrt)           | [logstash] add externalTrafficPolicy support                            |
| [elastic#1569](elastic#1569) | [@jmlrt](https://github.com/jmlrt)           | [logstash] add flexible ingress                                         |
| [elastic#1563](elastic#1563) | [@jmlrt](https://github.com/jmlrt)           | [meta] bump Helm version to 3.8.0                                       |
| [elastic#1538](elastic#1538) | [@chetanv-oi](https://github.com/chetanv-oi) | [elasticsearch] move the yaml separator inside the condition            |
| [elastic#1530](elastic#1530) | [@jmlrt](https://github.com/jmlrt)           | [kibana] use bash for readiness script                                  |
| [elastic#1527](elastic#1527) | [@ebuildy](https://github.com/ebuildy)       | [apm-server] add pod labels                                             |
| [elastic#1524](elastic#1524) | [@beatkind](https://github.com/beatkind)     | [metricbeat] bump kube-state-metrics to version 4.7.0                   |
| [elastic#1521](elastic#1521) | [@ebuildy](https://github.com/ebuildy)       | [apm-server] fix podLabels                                              |
| [elastic#1494](elastic#1494) | [@ebuildy](https://github.com/ebuildy)       | [elasticsearch] add keystore container securityContext                  |
| [elastic#1450](elastic#1450) | [@dmarcs](https://github.com/dmarcs)         | [logstash] allow array values for extra                                 |
| [elastic#1422](elastic#1422) | [@framsouza](https://github.com/framsouza)   | [metricbeat] adding custerRole permissions for leader election          |
| [elastic#1420](elastic#1420) | [@framsouza](https://github.com/framsouza)   | [elasticsearch] [logstash] add support to PodDisruptionBudget policy/v1 |
| [elastic#1417](elastic#1417) | [@framsouza](https://github.com/framsouza)   | [kibana] add annotations at deployment level                            |