Fix GraphQL::Backtrace::TracedError handling #2728

Job	Run time
test (Gemfile, 3.4)	1m 57s
test (Gemfile, 2.7)	1m 41s
lint	17s
test (gemfiles/rails_7.0.gemfile, 3.1)	2m 21s
javascript_test	28s
postgres_test (gemfiles/rails_master.gemfile, 3.3, 1)	2m 0s
test (gemfiles/rails_master.gemfile, 3.2)	2m 45s
postgres_test (gemfiles/rails_7.1_postgresql.gemfile, 3.3)	2m 8s
test (gemfiles/rails_7.0.gemfile, 3.2)	2m 2s
system_tests	29s
test (gemfiles/rails_7.1.gemfile, 3.3)	2m 6s
mongodb_test (gemfiles/mongoid_6.gemfile)	1m 43s
mongodb_test (gemfiles/mongoid_7.gemfile)	1m 45s
test (gemfiles/rails_master.gemfile, 3.3, 1, 1)	2m 36s
test (gemfiles/rails_master.gemfile, 3.4, 1, 1)	2m 32s
	26m 50s

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