Add tiers to troubleshooting docs

Add Free tier badges to admin troubleshooting doc pages.

doc/administration/troubleshooting/debug.md

@@ -4,7 +4,7 @@ group: Distribution
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Debugging Tips
+# Debugging tips **(FREE SELF)**
 
 Sometimes things don't work the way they should. Here are some tips on debugging issues out
 in production.

doc/administration/troubleshooting/defcon.md

@@ -5,21 +5,21 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Disaster Recovery
+# Disaster recovery **(FREE SELF)**
 
-This document describes a feature that allows to easily disable some important but computationally
-expensive parts of the application, in order to relieve stress on the database in an ongoing downtime.
+This document describes a feature that allows you to disable some important but computationally
+expensive parts of the application to relieve stress on the database during an ongoing downtime.
 
 ## `ci_queueing_disaster_recovery`
 
-This feature flag, if enabled temporarily disables fair scheduling on shared runners.
-This can help reduce system resource usage on the `jobs/request` endpoint
-by significantly reducing computations being performed.
+This feature flag, if temporarily enabled, disables fair scheduling on shared runners.
+This can help to reduce system resource usage on the `jobs/request` endpoint
+by significantly reducing the computations being performed.
 
 Side effects:
 
-- In case of a large backlog of jobs, the jobs will be processed in the order
-they were put in the system instead of balancing the jobs across many projects
+- In case of a large backlog of jobs, the jobs are processed in the order
+  they were put in the system, instead of balancing the jobs across many projects.
 - Projects which are out of quota will be run. This affects
-only jobs that were created during the last hour, as prior jobs are canceled
-by a periodic background worker (`StuckCiJobsWorker`).
+  only jobs created during the last hour, as prior jobs are canceled
+  by a periodic background worker (`StuckCiJobsWorker`).

doc/administration/troubleshooting/diagnostics_tools.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Diagnostics tools
+# Diagnostics tools **(FREE SELF)**
 
 These are some of the diagnostics tools the GitLab Support team uses during troubleshooting.
 They are listed here for transparency, and they may be useful for users with experience

doc/administration/troubleshooting/index.md

@@ -4,7 +4,7 @@ group: Distribution
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Troubleshooting a GitLab installation
+# Troubleshooting a GitLab installation **(FREE SELF)**
 
 This page documents a collection of resources to help you troubleshoot a GitLab
 installation.

doc/administration/troubleshooting/kubernetes_cheat_sheet.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Kubernetes, GitLab and You
+# Kubernetes, GitLab, and you **(FREE SELF)**
 
 This is a list of useful information regarding Kubernetes that the GitLab Support
 Team sometimes uses while troubleshooting. GitLab is making this public, so that anyone

doc/administration/troubleshooting/linux_cheat_sheet.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Linux Cheat Sheet
+# Linux cheat sheet **(FREE SELF)**
 
 This is the GitLab Support Team's collection of information regarding Linux, that they
 sometimes use while troubleshooting. It is listed here for transparency,

doc/administration/troubleshooting/log_parsing.md

@@ -4,7 +4,7 @@ group: Distribution
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Parsing GitLab logs with `jq`
+# Parsing GitLab logs with `jq` **(FREE SELF)**
 
 We recommend using log aggregation and search tools like Kibana and Splunk whenever possible,
 but if they are not available you can still quickly parse

doc/administration/troubleshooting/navigating_gitlab_via_rails_console.md

@@ -4,7 +4,7 @@ group: Distribution
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Navigating GitLab via Rails console
+# Navigating GitLab via Rails console **(FREE SELF)**
 
 At the heart of GitLab is a web application [built using the Ruby on Rails
 framework](https://about.gitlab.com/blog/2018/10/29/why-we-use-rails-to-build-gitlab/).

doc/administration/troubleshooting/sidekiq.md

@@ -4,7 +4,7 @@ group: Distribution
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---
 
-# Troubleshooting Sidekiq
+# Troubleshooting Sidekiq **(FREE SELF)**
 
 Sidekiq is the background job processor GitLab uses to asynchronously run
 tasks. When things go wrong it can be difficult to troubleshoot. These

doc/administration/troubleshooting/ssl.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Troubleshooting SSL
+# Troubleshooting SSL **(FREE SELF)**
 
 This page contains a list of common SSL-related errors and scenarios that you
 may encounter while working with GitLab. It should serve as an addition to the

doc/administration/troubleshooting/test_environments.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Apps for a Testing Environment
+# Apps for a testing environment **(FREE SELF)**
 
 This is the GitLab Support Team's collection of information regarding testing environments,
 for use while troubleshooting. It is listed here for transparency, and it may be useful

doc/administration/troubleshooting/tracing_correlation_id.md

@@ -5,7 +5,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: reference
 ---
 
-# Finding relevant log entries with a correlation ID
+# Finding relevant log entries with a correlation ID **(FREE SELF)**
 
 In GitLab 11.6 and later, a unique request tracking ID, known as the "correlation ID" has been
 logged by the GitLab instance for most requests. Each individual request to GitLab gets