Enable even more frozen string in lib/**/*.rb

Enables frozen string for the following files:

* lib/generators/**/*.rb
* lib/gitaly/**/*.rb
* lib/google_api/**/*.rb
* lib/haml_lint/**/*.rb
* lib/json_web_token/**/*.rb
* lib/mattermost/**/*.rb
* lib/microsoft_teams/**/*.rb
* lib/object_storage/**/*.rb
* lib/omni_auth/**/*.rb
* lib/peek/**/*.rb
* lib/rouge/**/*.rb
* lib/rspec_flaky/**/*.rb
* lib/system_check/**/*.rb

Partially addresses #47424.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/gitaly/server.rb b/lib/gitaly/server.rb
index f95e423ef22..7b238623418 100644
--- a/lib/gitaly/server.rb
+++ b/lib/gitaly/server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitaly
   class Server
     def self.all