HBASE-30363 Migrate AdaptiveLRU to LruCacheEngine and adaptive policy

[VladRodionov]

Summary

Migrates the native CacheAccessService path for AdaptiveLRU from
LruAdaptiveBlockCache to LruCacheEngine plus a dedicated adaptive
placement/admission policy.

The legacy BlockCache construction path remains unchanged.

Changes

• Add AdaptiveLruCachePlacementAdmissionPolicy.
• Move AdaptiveLRU admission state and adjustment logic into the policy.
• Add eviction-pressure feedback to CacheEvictionListener.
• Add a default eviction-pressure callback to CachePlacementAdmissionPolicy.
• Have LruCacheEngine report requested eviction pressure (bytesToFree).
• Have TopologyBackedCacheAccessService route:
  • concrete block evictions to CacheTopology;
  • eviction-pressure feedback to CachePlacementAdmissionPolicy.
• Use native LruCacheEngine for AdaptiveLRU in the CacheAccessService path.
• Preserve LruAdaptiveBlockCache for the legacy BlockCacheFactory
  construction path.

AdaptiveLRU behavior

The adaptive algorithm preserves the behavior of the legacy
LruAdaptiveBlockCache, including:

• the existing AdaptiveLRU configuration properties;
• the approximately 10-second evaluation window;
• requested eviction pressure rather than actual bytes freed;
• heavy-eviction count threshold;
• adaptive data-block admission percentage;
• deterministic block-offset filtering;
• recovery when eviction pressure decreases.

For tiered caches, AdaptiveLRU controls L1 admission only. It does not
globally reject a block that can still be placed in L2.

Tests

Adds coverage for:

• AdaptiveLRU admission adjustment and recovery;
• single-tier data-block admission;
• inclusive and exclusive tier placement;
• eviction-pressure reporting by LruCacheEngine;
• eviction-pressure routing through TopologyBackedCacheAccessService;
• native AdaptiveLRU CacheAccessService construction;
• preservation of the legacy LruAdaptiveBlockCache construction path.