[CB] Fix Memory leak in CBPipeImpl Constructor

[iefode]

Ticket:

• 160601

Reproducer:

• [DO NOT MERGE] Reproducer for memory leak #1547

Details:

• (Consequences) Infer Request object was weaked in CacheManager (3GB leak per iteration), Not cleaned block manager ( +2 MB per iteration).
• (Reason) Scheduler object was not removed from CBImpl destructor (CacheManager and BlockManager are field of the class). We have another Scheduler with virtual destructor. So, compiler can not resolve the class destructor methods, call desctructor from another class and does nothing.

Solution:

• To implement release method for Scheduler and call it from CBPipeImpl destructor.
• We should rename class to call normal destructor in future

Additional changes:

• to remove cache_manager field from pipeline because it is using only in scheduler

Results: