Add latest changes from gitlab-org/gitlab@master

...logs/unreleased/security-13338-fix-head-pipeline-leak.yml

changelogs/unreleased/security-gitaly-1-65-1.yml

..._updated_at_and_add_not_null_constraints_to_timestamps.rb

db/schema.rb

doc/push_rules/push_rules.md

lib/gitlab/snippet_search_results.rb

package.json

spec/features/projects/import_export/import_file_spec.rb

spec/javascripts/boards/issue_card_spec.js

spec/lib/gitlab/snippet_search_results_spec.rb

...ted_at_and_add_not_null_constraints_to_timestamps_spec.rb

spec/models/ci/pipeline_spec.rb

spec/models/commit_collection_spec.rb

spec/models/commit_spec.rb

spec/models/commit_with_pipeline_spec.rb

spec/presenters/commit_presenter_spec.rb

spec/support/helpers/select2_helper.rb

spec/support/omniauth_strategy.rb

vendor/gitignore/C++.gitignore

vendor/gitignore/Java.gitignore