Cache subscriber to decrease query count

[lastpeony]

#6783

Subscriber cache implemented using Caffeine to decrease mongodb load on subscriber read.

Subscriber read is called many times on SubscriberBlockFilter.java for subscriber.isBlocked(), checkIsTimedBasedSubscriber() and for webrtc play/publish isSubscriberBlocked() of WebSocketEnterpriseHandler.java

I used Caffeine because it has useful optimization features such as expireAfterWrite

testing confirms that it works well.
SUBSCRIBER_CACHE_EXPIRE_SECONDS set to 30, it can be lowered for possible syncronization issues.

executed-query-count rest api end point added for integration testing.

Cluster integration test:
https://gitlab.com/Ant-Media/testcluster/-/merge_requests/102

[lastpeony]

We had a discussion with @mekya, we will count mongodb calls and use it in cluster integration test to verify cache approach reduces mongodb load.

Regarding to design, cache approach is approved and we will proceed with it.

[lastpeony]

Cluster integration test added:
https://gitlab.com/Ant-Media/testcluster/-/merge_requests/102

[sonarcloud]

Quality Gate passed

Issues
13 New issues
0 Accepted issues

Measures
0 Security Hotspots
89.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud