Merge branch 'sh-fix-update-tests-metadata-try2' into 'master'

Fix update-tests-metadata job for Ruby 2.7 (part 2)

See merge request gitlab-org/gitlab!46103

.gitlab/ci/test-metadata.gitlab-ci.yml

@@ -38,6 +38,6 @@ update-tests-metadata:
     - rspec-ee integration pg11 geo
     - rspec-ee system pg11 geo
   script:
-    - run_timed_command "retry gem install fog-aws mime-types activesupport rspec_profiling postgres-copy --no-document"
+    - run_timed_command "retry gem install bundler:1.17.3 fog-aws mime-types activesupport rspec_profiling postgres-copy --no-document"
     - source ./scripts/rspec_helpers.sh
     - update_tests_metadata

lib/rspec_flaky/flaky_examples_collection.rb

 # frozen_string_literal: true
 
 require 'active_support/hash_with_indifferent_access'
+require 'delegate'
 
 require_relative 'flaky_example'