[deb] Add adduser as a dependency (#185048)

adduser is used in the deb post install script. Installing kibana.deb in
a container won't have the necessary dependencies by default

Closes #182537

---------

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

.buildkite/pipelines/pull_request/base.yml

@@ -14,7 +14,7 @@ steps:
       preemptible: true
     key: build
     if: "build.env('KIBANA_BUILD_ID') == null || build.env('KIBANA_BUILD_ID') == ''"
-    timeout_in_minutes: 60
+    timeout_in_minutes: 90
     retry:
       automatic:
         - exit_status: '-1'

src/dev/build/tasks/os_packages/create_os_package_tasks.ts

@@ -28,6 +28,8 @@ export const CreateDebPackage: Task = {
       'amd64',
       '--deb-priority',
       'optional',
+      '--depends',
+      ' adduser',
     ]);
 
     await runFpm(config, log, build, 'deb', 'arm64', [
@@ -35,6 +37,8 @@ export const CreateDebPackage: Task = {
       'arm64',
       '--deb-priority',
       'optional',
+      '--depends',
+      ' adduser',
     ]);
   },
 };