Upgrade rails to 6.1.7.2

What does this MR do and why?

We just upgraded to Rails 6.1.7.1. However, there's a regression https://github.com/rails/rails/issues/47055 which will affect certain domain's session cookies. See also https://rubyonrails.org/2023/1/24/Rails-7-0-4-2-and-6-1-7-2-have-been-released

Related: https://gitlab.com/gitlab-org/gitlab/-/issues/388365

Diffs:

• https://my.diffend.io/gems/actioncable/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/actionmailbox/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/actionmailer/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/actionpack/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/actiontext/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/actionview/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/activejob/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/activemodel/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/activerecord/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/activestorage/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/activesupport/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/rails/6.1.7.1/6.1.7.2
• https://my.diffend.io/gems/railties/6.1.7.1/6.1.7.2

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How to set up and validate locally

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MR acceptance checklist

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