Sustainable Kibana Architecture: Move modules owned by @elastic/logstash (#202756)

## Summary

This PR aims at relocating some of the Kibana modules (plugins and
packages) into a new folder structure, according to the _Sustainable
Kibana Architecture_ initiative.

> [!IMPORTANT]
> * We kindly ask you to:
> * Manually fix the errors in the error section below (if there are
any).
> * Search for the `packages[\/\\]` and `plugins[\/\\]` patterns in the
source code (Babel and Eslint config files), and update them
appropriately.
> * Manually review
`.buildkite/scripts/pipelines/pull_request/pipeline.ts` to ensure that
any CI pipeline customizations continue to be correctly applied after
the changed path names
> * Review all of the updated files, specially the `.ts` and `.js` files
listed in the sections below, as some of them contain relative paths
that have been updated.
> * Think of potential impact of the move, including tooling and
configuration files that can be pointing to the relocated modules. E.g.:
>     * customised eslint rules
>     * docs pointing to source code

> [!NOTE]
> * This PR has been auto-generated.
> * Any manual contributions will be lost if the 'relocate' script is
re-run.
> * Try to obtain the missing reviews / approvals before applying manual
fixes, and/or keep your changes in a .patch / git stash.
> * Please use
[#sustainable_kibana_architecture](https://elastic.slack.com/archives/C07TCKTA22E)
Slack channel for feedback.

#### 1 plugin(s) are going to be relocated:

| Id | Target folder |
| -- | ------------- |
| `@kbn/logstash-plugin` | `x-pack/platform/plugins/private/logstash` |


<details >
<summary>Updated references</summary>

```
./docs/developer/plugin-list.asciidoc
./package.json
./packages/kbn-repo-packages/package-map.json
./packages/kbn-synthetic-package-map/synthetic-packages.json
./packages/kbn-ts-projects/config-paths.json
./tsconfig.base.json
./tsconfig.base.type_check.json
./tsconfig.refs.json
./x-pack/.i18nrc.json
./x-pack/build/plugin/kibana/x-pack/.i18nrc.json
./x-pack/platform/plugins/private/logstash/jest.config.js
./yarn.lock
```

</details><details >
<summary>Updated relative paths</summary>

```
x-pack/platform/plugins/private/logstash/jest.config.js:10
x-pack/platform/plugins/private/logstash/tsconfig.json:3
```

</details>

.github/CODEOWNERS

@@ -846,6 +846,7 @@ x-pack/platform/plugins/private/file_upload @elastic/kibana-presentation @elasti
 x-pack/platform/plugins/private/grokdebugger @elastic/kibana-management
 x-pack/platform/plugins/private/index_lifecycle_management @elastic/kibana-management
 x-pack/platform/plugins/private/license_api_guard @elastic/kibana-management
+x-pack/platform/plugins/private/logstash @elastic/logstash
 x-pack/platform/plugins/private/painless_lab @elastic/kibana-management
 x-pack/platform/plugins/private/remote_clusters @elastic/kibana-management
 x-pack/platform/plugins/private/rollup @elastic/kibana-management
@@ -899,7 +900,6 @@ x-pack/plugins/global_search_providers @elastic/appex-sharedux
 x-pack/plugins/graph @elastic/kibana-visualizations
 x-pack/plugins/lens @elastic/kibana-visualizations
 x-pack/plugins/licensing @elastic/kibana-core
-x-pack/plugins/logstash @elastic/logstash
 x-pack/plugins/monitoring @elastic/stack-monitoring
 x-pack/plugins/monitoring_collection @elastic/stack-monitoring
 x-pack/plugins/notifications @elastic/appex-sharedux
@@ -2562,7 +2562,7 @@ x-pack/solutions/security/plugins/security_solution/server/lib/security_integrat
 /x-pack/test/functional/page_objects/logstash_page.ts @elastic/logstash
 /x-pack/test/functional/apps/logstash @elastic/logstash
 /x-pack/test/api_integration/apis/logstash @elastic/logstash
-#CC# /x-pack/plugins/logstash/ @elastic/logstash
+#CC# /x-pack/platform/plugins/private/logstash/ @elastic/logstash
 
 # EUI team
 /src/plugins/kibana_react/public/page_template/ @elastic/eui-team @elastic/appex-sharedux

docs/developer/plugin-list.asciidoc

@@ -711,7 +711,7 @@ using the CURL scripts in the scripts folder.
 |Exposes the shared components and APIs to access and visualize logs.
 
 
-|{kib-repo}blob/{branch}/x-pack/plugins/logstash[logstash]
+|{kib-repo}blob/{branch}/x-pack/platform/plugins/private/logstash[logstash]
 |WARNING: Missing README.
 
 

package.json

@@ -627,7 +627,7 @@
     "@kbn/logs-data-access-plugin": "link:x-pack/platform/plugins/shared/logs_data_access",
     "@kbn/logs-explorer-plugin": "link:x-pack/solutions/observability/plugins/logs_explorer",
     "@kbn/logs-shared-plugin": "link:x-pack/platform/plugins/shared/logs_shared",
-    "@kbn/logstash-plugin": "link:x-pack/plugins/logstash",
+    "@kbn/logstash-plugin": "link:x-pack/platform/plugins/private/logstash",
     "@kbn/managed-content-badge": "link:packages/kbn-managed-content-badge",
     "@kbn/management-cards-navigation": "link:src/platform/packages/shared/kbn-management/cards_navigation",
     "@kbn/management-plugin": "link:src/platform/plugins/shared/management",

tsconfig.base.json

@@ -1176,8 +1176,8 @@
       "@kbn/logs-explorer-plugin/*": ["x-pack/solutions/observability/plugins/logs_explorer/*"],
       "@kbn/logs-shared-plugin": ["x-pack/platform/plugins/shared/logs_shared"],
       "@kbn/logs-shared-plugin/*": ["x-pack/platform/plugins/shared/logs_shared/*"],
-      "@kbn/logstash-plugin": ["x-pack/plugins/logstash"],
-      "@kbn/logstash-plugin/*": ["x-pack/plugins/logstash/*"],
+      "@kbn/logstash-plugin": ["x-pack/platform/plugins/private/logstash"],
+      "@kbn/logstash-plugin/*": ["x-pack/platform/plugins/private/logstash/*"],
       "@kbn/managed-content-badge": ["packages/kbn-managed-content-badge"],
       "@kbn/managed-content-badge/*": ["packages/kbn-managed-content-badge/*"],
       "@kbn/managed-vscode-config": ["packages/kbn-managed-vscode-config"],

x-pack/.i18nrc.json

@@ -77,7 +77,7 @@
     "xpack.licensing": "plugins/licensing",
     "xpack.lists": "solutions/security/plugins/lists",
     "xpack.logstash": [
-      "plugins/logstash"
+      "platform/plugins/private/logstash"
     ],
     "xpack.main": "legacy/plugins/xpack_main",
     "xpack.maps": [

x-pack/platform/plugins/private/logstash/jest.config.js

@@ -7,11 +7,12 @@
 
 module.exports = {
   preset: '@kbn/test',
-  rootDir: '../../..',
-  roots: ['<rootDir>/x-pack/plugins/logstash'],
-  coverageDirectory: '<rootDir>/target/kibana-coverage/jest/x-pack/plugins/logstash',
+  rootDir: '../../../../..',
+  roots: ['<rootDir>/x-pack/platform/plugins/private/logstash'],
+  coverageDirectory:
+    '<rootDir>/target/kibana-coverage/jest/x-pack/platform/plugins/private/logstash',
   coverageReporters: ['text', 'html'],
   collectCoverageFrom: [
-    '<rootDir>/x-pack/plugins/logstash/{common,public,server}/**/*.{js,ts,tsx}',
+    '<rootDir>/x-pack/platform/plugins/private/logstash/{common,public,server}/**/*.{js,ts,tsx}',
   ],
 };