Enforce upgrade stop at 16.11

Before upgrading to GitLab/Omnibus 17.0, one must upgrade to
the GitLab/Omnibus 16.11.

Upgrade path documentation:
  https://docs.gitlab.com/ee/update/#upgrade-paths

Relates https://gitlab.com/gitlab-org/gitlab/-/issues/440234

Changelog: changed

Author: Clemens Beck

config/templates/package-scripts/preinst.erb

@@ -39,7 +39,7 @@ fi
 upgrade_check() {
   # Minimum version from which jumps are permitted to current version.
   # Follows https://docs.gitlab.com/ee/update/index.html#upgrade-paths
-  MIN_VERSION=16.7
+  MIN_VERSION=16.11
 
   if [ -n "${OLD_VERSION_STRING}" ] ; then
     # Checking

files/gitlab-ctl-commands/lib/gitlab_ctl/upgrade_check.rb

@@ -16,7 +16,7 @@ def valid?(ov)
       end
 
       def min_version
-        ENV['MIN_VERSION'] || '16.7'.freeze
+        ENV['MIN_VERSION'] || '16.11'.freeze
       end
     end
   end