Allow modsec secruleengine to be passed to autodeploy job

Supporting https://gitlab.com/gitlab-org/gitlab/issues/8558 this change
bumps the ADO image version and allows propagation of the
`AUTO_DEVOPS_MODSECURITY_SEC_RULE_ENGINE` variable to the ingress
resources created during Auto-Deploy jobs

changelogs/unreleased/8558-bump-ado-image-for-modsec-secruleengine.yml

+---
+title: Bump Auto-Deploy image to v0.3.0
+merge_request: 18809
+author:
+type: added

doc/topics/autodevops/index.md

@@ -924,6 +924,7 @@ applications.
 | `AUTO_DEVOPS_CHART_REPOSITORY_NAME`     | From GitLab 11.11, used to set the name of the Helm repository. Defaults to `gitlab`. |
 | `AUTO_DEVOPS_CHART_REPOSITORY_USERNAME` | From GitLab 11.11, used to set a username to connect to the Helm repository. Defaults to no credentials. Also set `AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD`. |
 | `AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD` | From GitLab 11.11, used to set a password to connect to the Helm repository. Defaults to no credentials. Also set `AUTO_DEVOPS_CHART_REPOSITORY_USERNAME`. |
+| `AUTO_DEVOPS_MODSECURITY_SEC_RULE_ENGINE` | From GitLab 12.5, used in combination with [Modsecurity feature flag](../../user/clusters/applications.md#web-application-firewall-modsecurity) to toggle [Modsecurity's `SecRuleEngine`](https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual-(v2.x)#SecRuleEngine) behavior. Defaults to `DetectionOnly`. |
 | `BUILDPACK_URL`                         | Buildpack's full URL. Can point to either Git repositories or a tarball URL. For Git repositories, it is possible to point to a specific `ref`. For example `https://github.com/heroku/heroku-buildpack-ruby.git#v142`. |
 | `CANARY_ENABLED`                        | From GitLab 11.0, used to define a [deploy policy for canary environments](#deploy-policy-for-canary-environments-premium). |
 | `CANARY_PRODUCTION_REPLICAS`            | Number of canary replicas to deploy for [Canary Deployments](../../user/project/canary_deployments.md) in the production environment. Takes precedence over `CANARY_REPLICAS`. Defaults to 1. |

lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml

 .auto-deploy:
-  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.1.0"
+  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.3.0"
 
 review:
   extends: .auto-deploy