Merge branch 'disable-rspec-full-stacktrace' into 'master'

Disable rspec's full_backtrace on CI

See merge request gitlab-org/gitlab!40701

spec/spec_helper.rb

@@ -66,7 +66,11 @@ RSpec.configure do |config|
   config.display_try_failure_messages = true
 
   config.infer_spec_type_from_file_location!
-  config.full_backtrace = !!ENV['CI']
+
+  # Add :full_backtrace tag to an example if full_backtrace output is desired
+  config.before(:each, full_backtrace: true) do |example|
+    config.full_backtrace = true
+  end
 
   unless ENV['CI']
     # Re-run failures locally with `--only-failures`