Add tier badges to Auth pages

Add tier badging to the pages in the Auth directory.

doc/administration/auth/README.md

@@ -6,7 +6,7 @@ group: Access
 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
 ---
 
-# GitLab authentication and authorization
+# GitLab authentication and authorization **(FREE SELF)**
 
 GitLab integrates with the following external authentication and authorization
 providers:

doc/administration/auth/atlassian.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# Atlassian OmniAuth Provider
+# Atlassian OmniAuth Provider **(FREE SELF)**
 
 To enable the Atlassian OmniAuth provider for passwordless authentication you must register an application with Atlassian.
 

doc/administration/auth/authentiq.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# Authentiq OmniAuth Provider
+# Authentiq OmniAuth Provider **(FREE SELF)**
 
 To enable the Authentiq OmniAuth provider for passwordless authentication you must register an application with Authentiq.
 

doc/administration/auth/cognito.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# Amazon Web Services Cognito
+# Amazon Web Services Cognito **(FREE SELF)**
 
 Amazon Cognito lets you add user sign-up, sign-in, and access control to your GitLab instance.
 The following documentation enables Cognito as an OAuth2 provider.

doc/administration/auth/crowd.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# Atlassian Crowd OmniAuth Provider
+# Atlassian Crowd OmniAuth Provider **(FREE SELF)**
 
 Authenticate to GitLab using the Atlassian Crowd OmniAuth provider. Enabling
 this provider also allows Crowd authentication for Git-over-https requests.

doc/administration/auth/jwt.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# JWT OmniAuth provider
+# JWT OmniAuth provider **(FREE SELF)**
 
 To enable the JWT OmniAuth provider, you must register your application with JWT.
 JWT will provide you with a secret key for you to use.

doc/administration/auth/ldap/ldap-troubleshooting.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# LDAP Troubleshooting for Administrators
+# LDAP Troubleshooting for Administrators **(FREE SELF)**
 
 ## Common Problems & Workflows
 

doc/administration/auth/oidc.md

@@ -5,7 +5,7 @@ group: Access
 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
 ---
 
-# OpenID Connect OmniAuth provider
+# OpenID Connect OmniAuth provider **(FREE SELF)**
 
 GitLab can use [OpenID Connect](https://openid.net/specs/openid-connect-core-1_0.html) as an OmniAuth provider.