Add GraphQL::Query::Partial #2633

Job	Run time
system_tests	27s
lint	18s
javascript_test	27s
mongodb_test (gemfiles/mongoid_6.gemfile)	1m 18s
postgres_test (gemfiles/rails_master.gemfile, 3.3, 1)	1m 40s
mongodb_test (gemfiles/mongoid_7.gemfile)	1m 23s
test (Gemfile, 3.2)	1m 25s
postgres_test (gemfiles/rails_7.1_postgresql.gemfile, 3.3)	1m 32s
test (Gemfile, 2.7)	1m 6s
test (gemfiles/rails_7.0.gemfile, 3.1)	1m 56s
test (gemfiles/rails_master.gemfile, 3.2)	2m 9s
test (gemfiles/rails_7.0.gemfile, 3.2)	1m 32s
test (gemfiles/rails_7.1.gemfile, 3.3)	1m 38s
test (gemfiles/rails_master.gemfile, 3.3, 1)	1m 51s
test (gemfiles/rails_master.gemfile, 3.3, 1, 1)	1m 48s
	20m 30s

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