[Backport] Bump GitLab Shell version to 14.33.0
What does this MR do and why?
This MR brings Bump GitLab Shell version to 14.33.0 (!142296 - merged) into the 16-8-stable-ee
branch so it can be released as part of 16.8.1
This backport MR is required in order to bring v14.33.0
of gitlab-shell into the GitLab 16.8 release to address gitlab-shell Kerberos failures experienced by a customer (context).
Once this MR is merged, it will result in a 'proper' registry.gitlab.com/gitlab-org/build/cng/gitlab-shell:v14.33.0
Docker image being generated which the customer can then use, instead of a bespoke gitlab-shell Docker image that was generated to test out the fix.
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