[Authz] Added reason for authorization opt-out for logstash routes (#213891)

## Summary

Added reason for authorization opt-out for logstash routes.


### Checklist

- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

x-pack/platform/plugins/private/logstash/server/routes/cluster/load.ts

@@ -14,6 +14,12 @@ export function registerClusterLoadRoute(router: LogstashPluginRouter) {
   router.get(
     {
       path: '/api/logstash/cluster',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       validate: false,
     },
     wrapRouteWithLicenseCheck(checkLicense, async (context, request, response) => {

x-pack/platform/plugins/private/logstash/server/routes/pipeline/delete.ts

@@ -14,6 +14,12 @@ export function registerPipelineDeleteRoute(router: LogstashPluginRouter) {
   router.delete(
     {
       path: '/api/logstash/pipeline/{id}',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       options: {
         access: 'public',
         summary: `Delete a managed Logstash pipeline`,

x-pack/platform/plugins/private/logstash/server/routes/pipeline/load.ts

@@ -16,6 +16,12 @@ export function registerPipelineLoadRoute(router: LogstashPluginRouter) {
   router.get(
     {
       path: '/api/logstash/pipeline/{id}',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       options: {
         access: 'public',
         summary: `Get a managed Logstash pipeline`,

x-pack/platform/plugins/private/logstash/server/routes/pipeline/save.ts

@@ -17,6 +17,12 @@ export function registerPipelineSaveRoute(router: LogstashPluginRouter) {
   router.put(
     {
       path: '/api/logstash/pipeline/{id}',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       options: {
         access: 'public',
         summary: `Create a managed Logstash pipeline`,

x-pack/platform/plugins/private/logstash/server/routes/pipelines/delete.ts

@@ -36,6 +36,12 @@ export function registerPipelinesDeleteRoute(router: LogstashPluginRouter) {
   router.post(
     {
       path: '/api/logstash/pipelines/delete',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       options: {
         access: 'public',
         summary: `Delete managed Logstash pipelines`,

x-pack/platform/plugins/private/logstash/server/routes/pipelines/list.ts

@@ -27,6 +27,12 @@ export function registerPipelinesListRoute(router: LogstashPluginRouter) {
   router.get(
     {
       path: '/api/logstash/pipelines',
+      security: {
+        authz: {
+          enabled: false,
+          reason: 'This route delegates authorization to the scoped ES client',
+        },
+      },
       options: {
         access: 'public',
         summary: `Get all managed Logstash pipelines`,