Specify a dummy version for gitlab-backup-cli

The `gitlab-backup-cli` wrapper should not cause a cache
bust. This adds a dummy version to prevent it.

Related https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/8476

Signed-off-by: Balasankar 'Balu' C <balasankar@gitlab.com>

.rubocop_todo.yml

@@ -31,6 +31,7 @@ Fips/MD5:
     - 'config/software/gitlab-pg-ctl.rb'
     - 'config/software/gitlab-psql.rb'
     - 'config/software/gitlab-redis-cli.rb'
+    - 'config/software/gitlab-backup-cli.rb'
     - 'files/gitlab-cookbooks/gitlab/libraries/helpers/base_pg_helper.rb'
     - 'files/gitlab-cookbooks/gitlab/libraries/rails_migration_helper.rb'
     - 'files/gitlab-ctl-commands/lib/postgresql/password_hash.rb'

config/software/gitlab-backup-cli.rb

@@ -14,6 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+
+require 'digest'
+
 name 'gitlab-backup-cli'
 
 license 'Apache-2.0'
@@ -21,6 +24,10 @@ license_file File.expand_path('LICENSE', Omnibus::Config.project_root)
 
 skip_transitive_dependency_licensing true
 
+# This 'software' is self-contained in this file. Use the file contents
+# to generate a version string.
+default_version Digest::MD5.file(__FILE__).hexdigest
+
 build do
   mkdir "#{install_dir}/bin/"
   # Create a wrapper for the gitlab-backup-cli tool