Exchange buy_ci_minutes links

What does this MR do and why?

We are moving CI Minutes purchase flow form CustomersPortal to GitLab flow. This MR exchanges a few links that were still pointing on /buy_ci_minutes with tailored GitLab purchase links

Related to #346251 (closed)

Screenshots or screen recordings

Limit warning email	Out of minutes
HTML	HTML
Plain text	Plain text

Alert notification

How to set up and validate locally

Check updated email templates:

1. Open http://localhost:3000/rails/mailers/ci_minutes_usage_mailer/
2. Check limit_warning and out_of_minutes template, both HTML and plain text

Check notification update, we show it on a group AND on a project page:

1. You can either setup your group to run out minutes, or change the return value in ee/app/models/ci/minutes/context.rb

Patch

diff --git a/ee/app/models/ci/minutes/context.rb b/ee/app/models/ci/minutes/context.rb
index d6796329141..827172f674b 100644
--- a/ee/app/models/ci/minutes/context.rb
+++ b/ee/app/models/ci/minutes/context.rb
@@ -16,6 +16,7 @@ def initialize(project, namespace, tracking_strategy: nil)
       end
 
       def percent_total_minutes_remaining
+        return 5
         quota.percent_total_minutes_remaining
       end
 

1. Go to your group page http://localhost:3000/test-group/ and check the Buy more Pipeline minutes link
2. Go to a project within the group http://localhost:3000/test-group/test-project and check the Buy more Pipeline minutes link

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.