[8.x] Allow elasticsearch.publicBaseUrl to be set using an environmen…

…t variable (#193716) (#193860)

# Backport

This will backport the following commits from `main` to `8.x`:
- [Allow elasticsearch.publicBaseUrl to be set using an environment
variable (#193716)](#193716)

<!--- Backport version: 8.9.8 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Philipse","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-09-23T16:43:45Z","message":"Allow
elasticsearch.publicBaseUrl to be set using an environment variable
(#193716)\n\n## Summary\r\n\r\nAllows users to set
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elasticsearch.publicBaseUrl to be set using an environment variable
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BACKPORT-->

src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker

@@ -64,6 +64,7 @@ kibana_vars=(
     elasticsearch.logQueries
     elasticsearch.password
     elasticsearch.pingTimeout
+    elasticsearch.publicBaseUrl
     elasticsearch.requestHeadersWhitelist
     elasticsearch.requestTimeout
     elasticsearch.serviceAccountToken

x-pack/plugins/cloud/public/types.ts

@@ -228,7 +228,7 @@ export interface CloudSetup {
 
 export interface PublicElasticsearchConfigType {
   /**
-   * The URL to the Elasticsearch cluster, derived from xpack.elasticsearch.publicBaseUrl if populated
+   * The URL to the Elasticsearch cluster, derived from elasticsearch.publicBaseUrl if populated
    * Otherwise this is based on the cloudId
    * If neither is populated, this will be undefined
    */