Merge pull request #4287 from DataDog/add-ostruct-gem-to-ruby-3-5-gem…

…file

Move `ostruct` gem out from test group for Ruby 3.5

ruby-3.5.gemfile

@@ -27,6 +27,7 @@ gem 'json-schema', '< 3' # V3 only works with 2.5+
 gem 'memory_profiler', '~> 0.9'
 gem 'mutex_m'
 gem 'os', '~> 1.1'
+gem 'ostruct'
 gem 'pimpmychangelog', '>= 0.1.2'
 gem 'pry'
 gem 'pry-stack_explorer'
@@ -62,7 +63,3 @@ group :dev do
   gem 'ruby-lsp', require: false
   gem 'appraisal', '~> 2.4.0', require: false
 end
-
-group :test do
-  gem 'ostruct'
-end