Merge branch 'alipniagov-make-grape-definition-compatible-with-ruby3' into 'master'

Make Grape API defintion compatible with Ruby 3 [RUN ALL RSPEC]

See merge request gitlab-org/gitlab!70305

lib/api/entities/blob.rb

@@ -10,7 +10,7 @@ module API
       # in the future we can only return the filename here without the leading
       # directory path.
       # https://gitlab.com/gitlab-org/gitlab/issues/34521
-      expose :filename, &:path
+      expose :path, as: :filename
       expose :id
       expose :ref
       expose :startline