MINOR: Speed up ShareConsumerTest.testAcquisitionLockTimeoutOnConsumer

[Russole]

Summary

Speed up ShareConsumerTest.testAcquisitionLockTimeoutOnConsumer by
overriding the broker-side share record lock duration for this test.

The test previously relied on the class-level
group.share.record.lock.duration.ms=15000 and waited 20000ms for the
acquisition lock to expire. This PR lowers the test-specific lock
duration to 5000ms and reduces the sleep to 8000ms.

Both group.share.min.record.lock.duration.ms and
group.share.record.lock.duration.ms are set because the actual lock
duration must be greater than or equal to the configured minimum.

Reviewers: Chia-Ping Tsai
chia7712@gmail.com

Testing

Ran the target test repeatedly to check for flakiness:

./gradlew :clients:clients-integration-tests:test --tests
org.apache.kafka.clients.consumer.ShareConsumerTest.testAcquisitionLockTimeoutOnConsumer
--rerun-tasks
Result: 10/10 passed.

[Russole]

Hi @chia7712 , could you please take a look when you have time? Thanks!