KAFKA-18131: Improve logs for voters

[frankvicky]

JIRA: KAFKA-18131

Currently, the log of LeaderState#timeUntilCheckQuorumExpires uses streams without a terminal operator, resulting in output like java.util.stream.ReferencePipeline$3@39660237.
This PR aims to fix this issue and improve the log message.

log after this PR:

[2024-12-04 17:40:06,184] INFO Did not receive fetch request from the majority of the voters within 3000ms. Current fetched voters are [3], and voters are [ReplicaKey(id=3, directoryId=Viibdq8iQpWShRTAzqWS4Q), ReplicaKey(id=4, directoryId=0fYZLl_RSXyW9pD51y-SSA), ReplicaKey(id=2, directoryId=TszqnKezTXKIKZt5aJl32A), ReplicaKey(id=0, directoryId=HSOI7G7iTBOd3aSG7us-Sg), ReplicaKey(id=1, directoryId=OdpwGEzaQcSrW8qP6bXU6Q)] (org.apache.kafka.raft.LeaderState:154)
[2024-12-04 17:40:06,201] INFO Did not receive fetch request from the majority of the voters within 3000ms. Current fetched voters are [3], and voters are [ReplicaKey(id=2, directoryId=<undefined>), ReplicaKey(id=3, directoryId=<undefined>), ReplicaKey(id=4, directoryId=<undefined>), ReplicaKey(id=0, directoryId=<undefined>), ReplicaKey(id=1, directoryId=<undefined>)] (org.apache.kafka.raft.LeaderState:154)

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[frankvicky]

Hi @showuon
Could you please take a look when you have some time ?
Many thanks 😺

[showuon]

LGTM! Thanks for the improvement.