chore: Update CODEOWNERS for helper gems #2679

Job	Run time
kafka / racecar / ubuntu-latest	14m 42s
mysql / mysql2 / ubuntu-latest	1m 52s
kafka / rdkafka / ubuntu-latest	15m 10s
mysql / trilogy / ubuntu-latest	1m 14s
kafka / ruby_kafka / ubuntu-latest	5m 44s
postgresql / pg / ubuntu-latest	2m 56s
rabbitmq / bunny / ubuntu-latest	55s
postgresql / que / ubuntu-latest	2m 2s
redis / redis / ubuntu-latest	2m 4s
other / dalli / ubuntu-latest	2m 28s
other / mongo / ubuntu-latest	2m 34s
redis / resque / ubuntu-latest	1m 57s
redis / sidekiq / ubuntu-latest	6m 4s
	59m 42s

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