Merge branch 'uncomment_commit_signatures_feature_flag' into 'master'

Upgrade to gitaly 1.60.0 and uncomment get_commit_signatures feature flag

Closes #65991

See merge request gitlab-org/gitlab-ce!31981

GITALY_SERVER_VERSION

-1.59.0
+1.60.0

changelogs/unreleased/uncomment_commit_signatures_feature_flag.yml

+---
+title: Upgrade to Gitaly 1.60.0
+merge_request: 31981
+author:
+type: changed

lib/feature/gitaly.rb

@@ -7,7 +7,7 @@ class Feature
     # Server feature flags should use '_' to separate words.
     SERVER_FEATURE_FLAGS =
       [
-        # 'get_commit_signatures'.freeze
+        'get_commit_signatures'.freeze
       ].freeze
 
     DEFAULT_ON_FLAGS = Set.new([]).freeze