chore: Bump Kafka to Kafka 3.8.0, Confluent 7.8.0

https://archive.apache.org/dist/kafka/3.7.0/RELEASE_NOTES.html
https://archive.apache.org/dist/kafka/3.8.0/RELEASE_NOTES.html

https://docs.confluent.io/platform/7.7/release-notes/index.html
https://docs.confluent.io/platform/7.8/release-notes/index.html

Author: devinrsmith

gradle/libs.versions.toml

@@ -15,8 +15,8 @@ commons-lang3 = "3.17.0"
 commons-math3 = "3.6.1"
 commons-text = "1.13.0"
 # confluent and confluent-kafak-clients should be kept in-sync
-confluent = "7.6.0"
-confluent-kafka-clients = "7.6.0-ccs"
+confluent = "7.8.0"
+confluent-kafka-clients = "7.8.0-ccs"
 dagger = "2.54"
 deephaven-barrage = "0.7.2"
 deephaven-csv = "0.15.0"